Beyoncé is one smitten starlet.
The notoriously private performer, 31, recently got candid with Oprah, and gushed about the love of her life, husband Jay-Z, 43.
"I would not be the woman I am if I did not go home to that man," the new mom said firmly, almost as if she she was about to get teary-eyed. "It just gives me such a foundation. [He's helped me] on so many levels."
But it wasn't love at first sight for the power pair.
"We were friends first for a year and a half before we went on any dates," Beyoncé explains. "We were on the phone for a year and a half, and that foundation is so important for a relationship. Just to have someone who you just like is so important, and someone [who] is honest."
For the longest time, the couple refused to address their marriage to media, and that is something the talk show host finds particularly amusing.
"I remember the first time you were on the Oprah show, I told you, 'Don't go around telling people who you're dating,' " Oprah recalls. "I think you took that all the way. Don't tell people who you're dating, but you can tell people who you're married to, OK?"
The singer is set to get even more personal in her Life Is But a Dream documentary, airing Saturday night on HBO. In an already-featured clip from the highly anticipated documentary, Beyoncé revealed she miscarried before giving birth to Blue Ivy.
BOSTON (AP) — What happens to fish that swim in waters tainted by traces of drugs that people take? When it's an anti-anxiety drug, they become hyper, anti-social and aggressive, a study found. They even get the munchies.
It may sound funny, but it could threaten the fish population and upset the delicate dynamics of the marine environment, scientists say.
The findings, published online Thursday in the journal Science, add to the mounting evidence that minuscule amounts of medicines in rivers and streams can alter the biology and behavior of fish and other marine animals.
"I think people are starting to understand that pharmaceuticals are environmental contaminants," said Dana Kolpin, a researcher for the U.S. Geological Survey who is familiar with the study.
Calling their results alarming, the Swedish researchers who did the study suspect the little drugged fish could become easier targets for bigger fish because they are more likely to venture alone into unfamiliar places.
"We know that in a predator-prey relation, increased boldness and activity combined with decreased sociality ... means you're going to be somebody's lunch quite soon," said Gregory Moller, a toxicologist at the University of Idaho and Washington State University. "It removes the natural balance."
Researchers around the world have been taking a close look at the effects of pharmaceuticals in extremely low concentrations, measured in parts per billion. Such drugs have turned up in waterways in Europe, the U.S. and elsewhere over the past decade.
They come mostly from humans and farm animals; the drugs pass through their bodies in unmetabolized form. These drug traces are then piped to water treatment plants, which are not designed to remove them from the cleaned water that flows back into streams and rivers.
The Associated Press first reported in 2008 that the drinking water of at least 51 million Americans carries low concentrations of many common drugs. The findings were based on questionnaires sent to water utilities, which reported the presence of antibiotics, sedatives, sex hormones and other drugs.
The news reports led to congressional hearings and legislation, more water testing and more public disclosure. To this day, though, there are no mandatory U.S. limits on pharmaceuticals in waterways.
The research team at Sweden's Umea University used minute concentrations of 2 parts per billion of the anti-anxiety drug oxazepam, similar to concentrations found in real waters. The drug belongs to a widely used class of medicines known as benzodiazepines that includes Valium and Librium.
The team put young wild European perch into an aquarium, exposed them to these highly diluted drugs and then carefully measured feeding, schooling, movement and hiding behavior. They found that drug-exposed fish moved more, fed more aggressively, hid less and tended to school less than unexposed fish. On average, the drugged fish were more than twice as active as the others, researcher Micael Jonsson said. The effects were more pronounced at higher drug concentrations.
"Our first thought is, this is like a person diagnosed with ADHD," said Jonsson, referring to attention deficit-hyperactivity disorder. "They become asocial and more active than they should be."
Tomas Brodin, another member of the research team, called the drug's environmental impact a global problem. "We find these concentrations or close to them all over the world, and it's quite possible or even probable that these behavioral effects are taking place as we speak," he said Thursday in Boston at the annual meeting of the American Association for the Advancement of Science.
Most previous research on trace drugs and marine life has focused on biological changes, such as male fish that take on female characteristics. However, a 2009 study found that tiny concentrations of antidepressants made fathead minnows more vulnerable to predators.
It is not clear exactly how long-term drug exposure, beyond the seven days in this study, would affect real fish in real rivers and streams. The Swedish researchers argue that the drug-induced changes could jeopardize populations of this sport and commercial fish, which lives in both fresh and brackish water.
Water toxins specialist Anne McElroy of Stony Brook University in New York agreed: "These lower chronic exposures that may alter things like animals' mating behavior or its ability to catch food or its ability to avoid being eaten — over time, that could really affect a population."
Another possibility, the researchers said, is that more aggressive feeding by the perch on zooplankton could reduce the numbers of these tiny creatures. Since zooplankton feed on algae, a drop in their numbers could allow algae to grow unchecked. That, in turn, could choke other marine life.
The Swedish team said it is highly unlikely people would be harmed by eating such drug-exposed fish. Jonsson said a person would have to eat 4 tons of perch to consume the equivalent of a single pill.
Researchers said more work is needed to develop better ways of removing drugs from water at treatment plants. They also said unused drugs should be brought to take-back programs where they exist, instead of being flushed down the toilet. And they called on pharmaceutical companies to work on "greener" drugs that degrade more easily.
Sandoz, one of three companies approved to sell oxazepam in the U.S., "shares society's desire to protect the environment and takes steps to minimize the environmental impact of its products over their life cycle," spokeswoman Julie Masow said in an emailed statement. She provided no details.
___
Online:
Overview of the drug: http://www.nlm.nih.gov/medlineplus/druginfo/meds/a682050.html
NEW YORK (Reuters) - The S&P 500 eked out a small gain for a third straight session on Thursday, helped by a flurry of merger activity, though investors see no catalysts to lift the market further with major averages near multi-year highs.
The market's slowed advance took the S&P 500 to its highest intraday level since November 2007 on Wednesday. While the index notched its third straight day of gains, none was more than 0.2 percent.
Shares of H.J. Heinz Co
Also supporting the market was data showing the number of Americans filing new claims for unemployment benefits fell more than expected in the latest week. The CBOE Volatility index <.vix> fell 2.4 percent, dropping to 12.67.
"While I'm not bearish, I don't see many upside motivations at these levels," said Donald Selkin, chief market strategist at National Securities in New York, who cited the low level of the VIX as a sign the market was overbought.
Equities have struggled to break above current levels where they have been hovering for almost two weeks. The S&P 500 is up more than 6 percent so far this year.
"We need to digest some of our gains to go higher, but people are so eager to buy on the dips that we're not even seeing dips anymore. People are just chasing the market higher," said Selkin, who helps oversee about $3 billion in assets.
Stocks fell earlier after a report the euro zone's gross domestic product contracted by the steepest amount since the first quarter of 2009. In addition, Japan's GDP shrank 0.1 percent in the fourth quarter, crushing expectations of a modest return to growth.
The Dow Jones industrial average <.dji> was down 9.52 points, or 0.07 percent, at 13,973.39. The Standard & Poor's 500 Index <.spx> was up 1.05 points, or 0.07 percent, at 1,521.38. The Nasdaq Composite Index <.ixic> was up 1.78 points, or 0.06 percent, at 3,198.66.
Constellation Brands
American Airlines and US Airways Group
Weakness in Europe contributed to a 5 percent drop in revenue from the region for Cisco Systems
General Motors Co
Only five more stocks rose than fell on the New York Stock Exchange, while 51 percent of Nasdaq-listed shares closed higher.
Volume was light, with about 6.36 billion shares changing hands on the New York Stock Exchange, the Nasdaq and NYSE MKT, below the daily average so far this year of about 6.48 billion shares.
(Editing by Nick Zieminski and Kenneth Barry)
WASHINGTON (Reuters) - The U.S. general nominated to oversee a vast region that includes Afghanistan on Thursday backed keeping Afghan forces at a peak strength of 352,000, contrary to current plans to shrink them after NATO declares the war over next year.
General Lloyd Austin, nominated to lead the U.S. military's Central Command, said at his Senate confirmation hearing that a more robust Afghan force, while more costly, would "hedge against any Taliban mischief" following America's longest war.
"Keeping the larger-size force would certainly reassure the Afghans, it would also reassure our NATO allies that we remain committed," Austin said.
The comments came two days after President Barack Obama announced in his State of the Union address that 34,000 U.S. troops - roughly half of the current U.S. force in Afghanistan - would be withdrawn by early 2014.
Obama reassured Americans that the costly, unpopular war was coming to an end, but he left unanswered bigger questions about America's exit strategy, including how many U.S. troops would stay in the country beyond 2014 to help train and advise the Afghans and to battle remnants of al Qaeda.
Obama also did not discuss the future size of the Afghan forces, although a White House fact sheet sent out after his address noted they would remain at 352,000 until "at least" early 2015.
Austin warned the Taliban would be waiting to test them.
"You could reasonably expect that an enemy that's been that determined, that agile, will very soon after we transition begin to try to test the Afghan security forces," Austin said.
Under current plans, the United States and its NATO allies will help build up the Afghan armed forces to 352,000 personnel, a number they are approaching, but the size of the force - which the allies will continue to fund - will be trimmed to 230,000 after 2015.
ECHOES OF IRAQ
The hearing frequently moved away from questions about the Afghan war and other current events to questions about Austin's past role as commander in Iraq, when a failure to strike an immunity deal for U.S. troops led to their total withdrawal in 2011.
Obama administration officials have warned that failure to strike an immunity deal with Afghanistan would also result in a pullout, but Afghan President Hamid Karzai and U.S. officials have expressed confidence a deal can be reached.
Republicans, who have criticized Obama's drawdown strategy in Afghanistan, noted that the president would have left a much smaller force in Iraq than Austin recommended, even if a deal had been struck.
Senator John McCain of Arizona lamented the lack of a U.S. presence in Iraq.
Pressed by Republicans, Austin acknowledged that the situation in Iraq was trending in a "problematic" direction, and agreed that a continued U.S. role would have helped bolster Iraqi forces.
When it came to Afghanistan, Senator Lindsay Graham of South Carolina warned Austin that if Obama sought an insufficient force for the post-2014 mission, he would refuse to vote for funding the war effort.
"It can be as low as 9 or 10,000, that I will stand with them," Graham said.
"If they overrule the commanders and create a force that cannot in my view be successful, I cannot in good conscience vote to continue this operation."
Graham said he would vote for Austin's confirmation once Austin spoke with the former commander of the Afghan mission, General John Allen, about his recommendations to Obama and reported back to the committee about his opinion.
(Reporting by Phil Stewart; Editing by David Brunnstrom)
At the Grammys he made our screens go sepia tone, and now, in his new, black-and-white, David Fincher-directed music video for the much hyped comeback single “Suit & Tie,” Justin Timberlake continues to try and prove that he’s a classy neo-Rat Pack star. That is, he’s a classy neo-Rat Pack star with a nearly naked women writhing around him and lot of “cool” modern conveniences like his iPad. See, JT gets rolled, via bed, into a soundstage-type area reading such a device:
RELATED: David Fincher Is Directing the Ridiculous Justin Timberlake Music Video
Before he starts performing the song at a venue that appears to be Los Angeles’ Hollywood Bowl, JT and Jay-Z are just kind of chilling, because remember these are two improbably famous bros with a lot of fancy amenities:
RELATED: The 2012 Gossip Stories We Loved
There are references to Singin’ in the Rain-type films:
RELATED: Dr. Dre and the Lucrative Business of Not Rapping
And then, later on, hot girls in puddles on a stage because such is the life of Justin Timberlake, apparently:
Watch the entire video here, and remember it was directed by Fincher, so they all probably did a million takes of every shot:
Gadgets News Headlines – Yahoo! News
Age is more than just a number for mom-of-three Melissa Joan Hart.
The actress, who welcomed her second child, Brady, now 4½, two years after the birth of her first son, Mason, now 7, says waiting until both boys were older to expand her family further was ideal.
“It’s definitely easier to have an infant when the other two boys are potty trained and can dress themselves,” Hart, 36, told PEOPLE at Wednesday’s Operation Shower in Pacific Palisades, Calif.
“I’m able to enjoy every single minute, and that has been great.”
Basking in baby bliss with her now 5-month-old son Tucker, Hart is embracing the opportunity to relive all of the major milestones for a third time.
“[Tucker] is just such a happy baby, lots of smiles and laughing. Like the other boys, he has great motor skills and right now it’s fun to see him grab at things,” she says.
Eddie Spantman
Unlike his older brothers, however, Tucker is already sporting some long locks. “One of the biggest differences is that he has tons of hair,” she says.
Having welcomed three children, Hart is adamant about celebrating every birth, which is why she has teamed up with Operation Shower and Birdies for the Brave, a mission to host baby showers for military families whose partners are serving overseas.
“I can’t even imagine how difficult it is for these military moms going through pregnancy alone while their spouses are in harm’s way. It’s an emotional time, especially with all of the hormones,” she says of the event, hosted by Carousel Designs.
“Operation Shower and Birdies for the Brave do a great job of making these moms feel special and recognizing all of their sacrifices at home. It’s a sincere pleasure to support these two outstanding organizations.”
With Valentine’s Day on Thursday, Hart and her husband Mark Wilkerson are looking forward to toasting to some couple time — only she’ll be phoning it in from the set of her show, Melissa & Joey.
“Valentine’s Day is my first day back at work, so I will be enjoying the day with the great cast and crew,” she says.
Continues Hart: “We usually celebrate the day before or the day after anyhow since it’s difficult getting a babysitter that night and it’s so crowded everywhere.”
– Anya Leon
The world seems surprised that an 85-year-old globe-trotting pope who just started tweeting wants to resign, but should it be? Maybe what should be surprising is that more leaders his age do not, considering the toll aging takes on bodies and minds amid a culture of constant communication and change.
There may be more behind the story of why Pope Benedict XVI decided to leave a job normally held for life. But the pontiff made it about age. He said the job called for "both strength of mind and body" and said his was deteriorating. He spoke of "today's world, subject to so many rapid changes," implying a difficulty keeping up despite his recent debut on Twitter.
"This seemed to me a very brave, courageous decision," especially because older people often don't recognize their own decline, said Dr. Seth Landefeld, an expert on aging and chairman of medicine at the University of Alabama at Birmingham.
Age has driven many leaders from jobs that used to be for life — Supreme Court justices, monarchs and other heads of state. As lifetimes expand, the woes of old age are catching up with more in seats of power. Some are choosing to step down rather than suffer long declines and disabilities as the pope's last predecessor did.
Since 1955, only one U.S. Supreme Court justice — Chief Justice William Rehnquist — has died in office. Twenty-one others chose to retire, the most recent being John Paul Stevens, who stepped down in 2010 at age 90.
When Thurgood Marshall stepped down in 1991 at the age of 82, citing health reasons, the Supreme Court justice's answer was blunt: "What's wrong with me? I'm old. I'm getting old and falling apart."
One in 5 U.S. senators is 70 or older, and some have retired rather than seek new terms, such as Hawaii's Daniel Akaka, who left office in January at age 88.
The Netherlands' Queen Beatrix, who just turned 75, recently said she will pass the crown to a son and put the country "in the hands of a new generation."
In Germany, where the pope was born, Chancellor Angela Merkel, who is 58, said the pope's decision that he was no longer fit for the job "earns my very highest respect."
"In our time of ever-lengthening life, many people will be able to understand how the pope as well has to deal with the burdens of aging," she told reporters in Berlin.
Experts on aging agreed.
"People's mental capacities in their 80s and 90s aren't what they were in their 40s and 50s. Their short-term memory is often not as good, their ability to think quickly on their feet, to execute decisions is often not as good," Landefeld said. Change is tougher to handle with age, and leaders like popes and presidents face "extraordinary demands that would tax anybody's physical and mental stamina."
Dr. Barbara Messinger-Rapport, geriatrics chief at the Cleveland Clinic, noted that half of people 85 and older in developed countries have some dementia, usually Alzheimer's. Even without such a disease, "it takes longer to make decisions, it takes longer to learn new things," she said.
But that's far from universal, said Dr. Thomas Perls, an expert on aging at Boston University and director of the New England Centenarians Study.
"Usually a man who is entirely healthy in his early 80s has demonstrated his survival prowess" and can live much longer, he said. People of privilege have better odds because they have access to good food and health care, and tend to lead clean lives.
"Even in the 1500s and 1600s there were popes in their 80s. It's remarkable. That would be today's centenarians," Perls said.
Arizona Sen. John McCain turned 71 while running for president in 2007. Had he won, he would have been the oldest person elected to a first term as president. Ronald Reagan was days away from turning 70 when he started his first term as president in 1981; he won re-election in 1984. Vice President Joe Biden just turned 70.
In the U.S. Senate, where seniority is rewarded and revered, South Carolina's Strom Thurmond didn't retire until age 100 in 2002. Sen. Robert Byrd of West Virginia was the longest-serving senator when he died in office at 92 in 2010.
Now the oldest U.S. senator is 89-year-old Frank Lautenberg of New Jersey. The oldest congressman is Ralph Hall of Texas who turns 90 in May.
The legendary Alan Greenspan was about to turn 80 when he retired as chairman of the Federal Reserve in 2006; he still works as a consultant.
Elsewhere around the world, Cuba's Fidel Castro — one of the world's longest serving heads of state — stepped down in 2006 at age 79 due to an intestinal illness that nearly killed him, handing power to his younger brother Raul. But the island is an example of aged leaders pushing on well into their dotage. Raul Castro now is 81 and his two top lieutenants are also octogenarians. Later this month, he is expected to be named to a new, five-year term as president.
Other leaders who are still working:
—England's Queen Elizabeth, 86.
—Abdullah bin Abd al-Aziz al-Saud, king of Saudi Arabia, 88.
—Sabah al-Ahmad al-Jaber al-Sabah, emir of Kuwait, 83.
—Ruth Bader Ginsburg, U.S. Supreme Court associate justice, 79.
__
Associated Press writers Paul Haven in Havana, Cuba; David Rising in Berlin; Seth Borenstein, Mark Sherman and Matt Yancey in Washington, and researcher Judy Ausuebel in New York contributed to this report.
___
Marilynn Marchione can be followed at http://twitter.com/MMarchioneAP
NEW YORK (Reuters) - Stocks closed modestly higher on Tuesday, putting the Dow within striking distance of an all-time high, as investors looked ahead to President Barack Obama's State of the Union address.
Investors will be listening to Obama's speech for any clues on a deal with Republicans to avert automatic spending cuts due to take effect March 1. The tone of the speech will also be scrutinized, with any sign of compromise likely to be warmly received.
The S&P 500 has risen for the past six weeks, putting it up 6.5 percent so far this year, while the Dow is about 1 percent away from its all-time closing record of 14,164.53, reached in October 2007.
But gains have been harder to come by since the S&P hit a five-year high on February 1. Daily moves have been small and trading volume light as investors search for new reasons to drive stocks higher.
About 5.73 billion shares changed hands on the New York Stock Exchange, the Nasdaq and NYSE MKT on Tuesday, below the daily average so far this year of about 6.48 billion shares.
"We're likely to settle in for a period and digest the gains we've had, though there's still a bias towards positive momentum," said Eric Teal, chief investment officer at First Citizens Bancshares in Raleigh, North Carolina.
"Questions over government spending are the big overhang, and we're looking for Obama to inspire some confidence over that tonight."
The White House has signaled Obama will urge investment in infrastructure and clean energy, suggesting companies in those sectors may be volatile in Wednesday's session.
"Gun makers could also see a reaction if Obama talks about anything with respect to gun control," said Teal, who helps oversee $5 billion. Shares of Smith & Wesson
The Dow Jones industrial average <.dji> was up 47.46 points, or 0.34 percent, at 14,018.70. The Standard & Poor's 500 Index <.spx> was up 2.42 points, or 0.16 percent, at 1,519.43. The Nasdaq Composite Index <.ixic> was down 5.51 points, or 0.17 percent, at 3,186.49.
Housing shares were among the strongest of the day, led by a 12.5 percent jump in Masco Corp
Avon Products Inc surged 20 percent to $20.79 as the S&P 500's top percentage gainer after the cosmetics company reversed sales declines and cut costs.
On the downside, Coca-Cola Co
Michael Kors Holdings
With earnings season starting to wind down, Thomson Reuters data through Tuesday morning shows of the 353 companies in the S&P 500 that have reported results, 70.3 percent have exceeded analysts' expectations, above a 62 percent average since 1994 and 65 percent over the past four quarters.
Fourth-quarter earnings for S&P 500 companies are estimated to have risen 5.3 percent, according to the data, above a 1.9 percent forecast at the start of the earnings season.
About 62 percent of stocks traded on the New York Stock Exchange closed higher while 59 percent of Nasdaq-listed shares closed in positive territory.
(Editing by Nick Zieminski)
SEOUL (Reuters) - North Korea conducted its third nuclear test on Tuesday in defiance of U.N. resolutions, drawing condemnation from around the world, including from its only major ally, China, which summoned the North Korean ambassador to protest.
Pyongyang said the test was an act of self-defense against "U.S. hostility" and threatened stronger steps if necessary.
The test puts pressure on U.S. President Barack Obama on the day of his State of the Union speech and also puts China in a tight spot, since it comes in defiance of Beijing's admonishments to North Korea to avoid escalating tensions.
The U.N. Security Council held an emergency meeting at which its members, including China, "strongly condemned" the test and vowed to start work on appropriate measures in response, the president of the council said.
North Korean leader Kim Jong-un, the third of his line to rule the country, has presided over two long-range rocket launches and a nuclear test during his first year in power, pursuing policies that have propelled his impoverished and malnourished country closer to becoming a nuclear weapons power.
North Korea said the test had "greater explosive force" than those it conducted in 2006 and 2009. Its KCNA news agency said it had used a "miniaturized" and lighter nuclear device, indicating it had again used plutonium, which is suitable for use as a missile warhead.
China, which has shown signs of increasing exasperation with the recent bellicose tone of its reclusive neighbor, summoned the North Korean ambassador in Beijing and protested sternly, the Foreign Ministry said.
Foreign Minister Yang Jiechi said China was "strongly dissatisfied and resolutely opposed" to the test and urged North Korea to "stop any rhetoric or acts that could worsen situations and return to the right course of dialogue and consultation as soon as possible".
Analysts said the test was a major embarrassment to China, which is a permanent member of the Security Council and North Korea's sole major economic and diplomatic ally.
Obama called the test a "highly provocative act" that hurt regional stability.
"The danger posed by North Korea's threatening activities warrants further swift and credible action by the international community. The United States will also continue to take steps necessary to defend ourselves and our allies," Obama said.
U.S. Ambassador to the United Nations Susan Rice said Washington and its allies intended to "augment the sanctions regime" already in place due to Pyongyang's previous atomic tests. North Korea is already one of the most heavily sanctioned states in the world and has few external economic links that can be targeted.
Japanese Prime Minister Shinzo Abe said the test was a "grave threat" that could not be tolerated.
Russian Foreign Minister Sergei Lavrov urged North Korea to abandon its nuclear arms program and return to talks. NATO condemned the test as an "irresponsible act."
South Korea, still technically at war with North Korea after a 1950-53 civil war ended in a mere truce, also denounced the test. Obama spoke to South Korean President Lee Myung-bak on Tuesday and told him the United States "remains steadfast in its defense commitments" to Korea, the White House said.
MAXIMUM RESTRAINT
North Korea's Foreign Ministry said the test was "only the first response we took with maximum restraint".
"If the United States continues to come out with hostility and complicates the situation, we will be forced to take stronger, second and third responses in consecutive steps," it said in a statement carried by the official KCNA news agency.
North Korea - which gave the U.S. State Department advance warning of the test - often threatens the United States and its "puppet", South Korea, with destruction in colorful terms.
North Korea told the U.N. disarmament forum in Geneva that it would never bow to resolutions on its nuclear program and that prospects were "gloomy" for the denuclearization of the divided Korean peninsula because of a "hostile" U.S. policy.
Suzanne DiMaggio, an analyst at the Asia Society in New York, said North Korea had embarrassed China with the test. "China's inability to dissuade North Korea from carrying through with this third nuclear test reveals Beijing's limited influence over Pyongyang's actions in unusually stark terms," she said.
Mark Fitzpatrick of the International Institute for Strategic Studies think tank, said: "The test is hugely insulting to China, which now can be expected to follow through with threats to impose sanctions."
The magnitude of the explosion was roughly twice that of the 2009 test, according to the Vienna-based Comprehensive Nuclear-Test Ban Treaty Organization. The U.S. Geological Survey said that a seismic event measuring 5.1 magnitude had occurred.
U.S. intelligence agencies were analyzing the event and found that North Korea probably conducted an underground nuclear explosion with a yield of "approximately several kilotons", the Office of the Director of National Intelligence said.
Nuclear experts have described Pyongyang's previous two tests as puny by international standards. The yield of the 2006 test has been estimated at less than 1 kiloton (1,000 tons of TNT equivalent) and the second at some 2-7 kilotons, compared with 20 kilotons for a Nagasaki-type bomb.
Initial indications are that the test involved the latest version of a plutonium-based prototype weapon, according to one current and one former U.S. national security official. Both previous tests involved plutonium. If it turns out the test was of a new uranium-based weapon, it would show that North Korea has made more progress on uranium enrichment than previously thought.
The United States uses WC-135 Constant Phoenix "sniffer" aircraft to collect samples to identify nuclear explosions. These would need to be deployed quickly to detect whether highly enriched uranium rather than plutonium was used because uranium decays to undetectable levels within a matter of days. Plutonium takes much longer to decay.
North Korea trumpeted news of the test on its state television channel to patriotic music against a backdrop of its national flag.
"It was confirmed that the nuclear test that was carried out at a high level in a safe and perfect manner using a miniaturized and lighter nuclear device with greater explosive force than previously did not pose any negative impact on the surrounding ecological environment," KCNA said.
North Korea linked the test to its technical prowess in launching a long-range rocket in December, a move that triggered the U.N. sanctions, backed by China, that Pyongyang said prompted it to take Tuesday's action.
The North's ultimate aim, Washington believes, is to design an intercontinental ballistic missile capable of carrying a nuclear warhead that could hit the United States. North Korea says the program is aimed at putting satellites in space.
Despite its three nuclear tests and long-range rocket tests, North Korea is not believed to be close to manufacturing a nuclear missile capable of hitting the United States.
It used plutonium in previous nuclear tests and before Tuesday there had been speculation that it would use highly enriched uranium so as to conserve its plutonium stocks, as testing eats into its limited supply of materials to construct a nuclear bomb.
"VICIOUS CYCLE"
When Kim Jong-un, who is 30, took power after his father's death in December 2011, there were hopes that he would bring reforms and end Kim Jong-il's "military first" policies.
Instead, North Korea, whose economy is smaller than it was 20 years ago and where a third of children are believed to be malnourished, appears to be trapped in a cycle of sanctions followed by further provocations.
"The more North Korea shoots missiles, launches satellites or conducts nuclear tests, the more the U.N. Security Council will impose new and more severe sanctions," said Shen Dingli, a professor at Shanghai's Fudan University. "It is an endless, vicious cycle."
Options for the international community appear to be in short supply. Diplomats at the United Nations said negotiations on new sanctions could take weeks since China is likely to resist tough new measures for fear they could lead to further retaliation by the North Korean leadership.
Beijing has also been concerned that tougher sanctions could further weaken North Korea's economy and prompt a flood of refugees into China.
Tuesday's action appeared to have been timed for the run-up to February 16 anniversary celebrations of Kim Jong-il's birthday, as well as to achieve maximum international attention.
Significantly, the test comes at a time of political transition in China, Japan and South Korea, and as Obama begins his second term. The U.S. president will likely have to tweak his State of the Union address due to be given on Tuesday.
Japanese Prime Minister Shinzo Abe is bedding down a new government and South Korea's new president, Park Geun-hye, is preparing to take office on February 25.
China too is in the midst of a once-in-a-decade leadership transition to Xi Jinping, who takes office in March. Both Abe and Xi are staunch nationalists.
The longer-term game plan from Pyongyang may be to restart international talks aimed at winning food and financial aid. China urged it to return to the stalled "six-party" talks on its nuclear program, hosted by China and including the two Koreas, the United States, Japan and Russia.
Its puny economy and small diplomatic reach mean that North Korea struggles to win attention on the global stage - other than through nuclear tests and attacks on South Korea, the last of which was made in 2010.
"Now the next step for North Korea will be to offer talks... - any form to start up discussion again to bring things to their advantage," predicted Jeung Young-tae, senior research fellow at the Korea Institute for National Unification in Seoul.
(Additional reporting by Jack Kim, Christine Kim and Jumin Park in SEOUL; Linda Sieg in TOKYO; Louis Charbonneau and Michelle Nichols at the UNITED NATIONS; Fredrik Dahl in VIENNA; Michael Martina and Chen Aizhu in BEIJING; Mette Fraende in COPENHAGEN; Adrian Croft, Charlie Dunmore and Justyna Pawlak in BRUSSELS; Mark Hosenball, Paul Eckert, Roberta Rampton, Tabassum Zakaria and Jeff Mason in WASHINGTON; Editing by Nick Macfie, Claudia Parsons and David Brunnstrom)
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