NYSE had a system in place to slow trading when a stock's price moved rapidly over a short period of time, but had to cancel it when the U.S. Securities and Exchange Commission introduced market-wide rules for trading halts in April.

The SEC's new system is being introduced in phases, and there are currently gaps when it is not in effect around the opening and close of the market each day.

NYSE said that reinstating its volatility curbs would "benefit investors, issuers, and market stability by offering an additional layer of protection during the periods currently not covered by" the SEC's rules.

On May 17, NYSE canceled trades in Anadarko Petroleum Corp after the company's value briefly plunged by 99 percent shortly before the market closed. And on May 23, shares of American Electric Power Inc and NextEra Energy Inc each plunged more than 50 percent in the first minute of trading, and then rebounded.

(Link to the NYSE filing: http://link.reuters.com/pyp58t)

(Reporting by John McCrank; Editing by Leslie Adler)

PHNOM PENH, Cambodia (AP) -- Cambodian police on Monday clashed with workers and arrested seven at a factory that makes clothing for the U.S. sportswear company Nike in the latest violence linked to a strike over salaries there, a union organizer said.

Free Trade Union of Workers of the Kingdom of Cambodia organizer Son Vanny said its members exchanged barrages of sticks and stones with members of a rival union opposing the strike, after which riot police arrived and started beating workers. He said seven workers were arrested, but police at the scene and at the Interior Ministry declined to comment on any arrests or possible injuries.

The protest at the Taiwanese-owned Sabrina (Cambodia) Garment Manufacturing plant in Kompong Speu, just west of the capital, Phnom Penh, began May 21 when workers demanded that their salaries be raised to the equivalent of $88 per month from $74. Their net pay is calculated to include overtime and various allowances.

Police allegedly used force when the workers blocked the main road outside the factory on May 27, reportedly causing two pregnant workers to miscarry. Nike, for whom the factory is a subcontractor, expressed concern about the situation.

After Monday's incident, Son Vanny accused police of beating and detaining only workers from his union. He said police alleged the workers had incited violence, a charge he denied.

Heng Sophors, an activist with the local human rights group Licadho who monitored the event, said that more than 1,000 riot police with batons and shields were deployed around the factory, and that some were also the targets of sticks and stones thrown by the protesters. He said some strikers were slightly injured when police waded in to try to restore order.

The garment industry is Cambodia's biggest export earner, employing about 500,000 people in more than 500 garment and shoe factories. In 2012, the Southeast Asian country shipped more $4 billion worth of products to the United States and Europe.

Pay is low and working conditions are usually uncomfortable at best. Last month, the ceiling of a Cambodian footwear factory collapsed, killing two people and injuring seven.

However, Cambodia hosts a unique program of the International Labor Organization called "Better Factories Cambodia" that assesses and reports on working conditions in all the country's export garment factories. The impetus for the program was an agreement under which Cambodia pledged better labor conditions in exchange for better trade privileges with the United States.

Because the industry is Cambodia's economic locomotive, garment workers also carry some political clout, a special concern for Prime Minister Hun Sen's government because it is an election year and some unions have long-standing ties with the political opposition.

WASHINGTON/TOKYO (Reuters) - Sprint Nextel Corp and Japan's SoftBank Corp have reached an agreement with U.S. authorities on the national security aspects of the Japanese firm's pending $20.1 billion deal to win control of the U.S. wireless carrier, people familiar with the matter said.

As a part of that agreement, the U.S. government will have a veto over new equipment purchases by Sprint in certain circumstances if the two companies merge, one source said.

The government will also establish a four-member oversight committee to make sure the companies abide by their national security promises. A Sprint board member will sit on that committee, said the source, who did not want to be named because the information was not public.

Formal announcement of the highly unusual agreement - drawn up amid fears of Chinese espionage - is likely to come early on Wednesday in the United States, four sources told Reuters.

Japanese mobile operator SoftBank agreed to buy a 70 percent stake in Sprint last October. That deal faces a challenge from Dish Network Corp, a U.S. satellite TV provider which last month launched a rival $25.5 billion bid for Sprint.

No one at Sprint was immediately available to comment, while SoftBank declined comment on Wednesday.

DISH WARNING

Dish has taken out full-page ads in Washington newspapers warning that a SoftBank-Sprint merger would threaten U.S. national security.

U.S. Senator Charles Schumer expressed strong concern last Friday about the proposed SoftBank-Sprint merger, warning it could expose the United States to Chinese cyber attacks.

Sources said SoftBank agreed with U.S. authorities to remove equipment made by China's Huawei Technologies Co Ltd from Sprint and Clearwire Corp's networks if the Japanese company completed its deal by the end of 2016. SoftBank President Masayoshi Son has said he will pull equipment made by China's ZTE Corp if asked by U.S. regulators.

The House Intelligence Committee last year urged U.S. telecoms firms not to do business with Huawei and ZTE because it said potential Chinese state influence on the companies posed a threat to U.S. security. SoftBank uses equipment made by ZTE and Huawei in Japan.

Last week, Clearwire's board recommended Sprint's sweetened buyout offer for the company after Sprint raised its bid to $3.40 per share, from $2.97 per share, for the 50 percent it doesn't already own. Clearwire shareholders will vote on the deal on Friday.

Dish reiterated its warnings on Tuesday that a SoftBank-Sprint tie-up posed national security risks.

"We believe the U.S. government should proceed with deliberation and caution in turning over assets of national strategic importance - such as the Sprint fiber backbone and wireless networks - to a foreign-controlled entity with significant ties to China," spokesman Bob Toevs said. "Oversight and accountability for our national network infrastructure is critical at a time when offshore attacks on that infrastructure continue to rise."

"POLITICS, PROTECTIONISM"

In an email, Huawei's U.S.-based spokesman William Plummer said: "No matter who wins the bid for Sprint, the future Sprint network will be sourced, in part, from China, just as are the networks of AT&T and Verizon and every other carrier. Every telecom infrastructure vendor, regardless of geography of headquarters, conducts R&D, codes software and manufactures gear ... in China.

"Suggestions that networks and data will somehow be made safer by blackballing vendors based on geography of headquarters are either uninformed or dissembling," Plummer added.

"Anyone who truly wants more secure American networks and data should focus instead on establishing apolitical geography-agnostic global and industry-wide supply chains and operational standards to raise the cyber-security bar for everyone. Anything else is just politics and protectionism," he said.

Industry experts say the U.S. Federal Communications Commission is unlikely to rule before Sprint makes a final choice of buyer and the inter-agency Committee on Foreign Investment in the United States (CFIUS) completes its own review. Sprint shareholders are due to vote on the SoftBank offer on June 12.

CFIUS reviews are highly secretive and weigh whether foreign ownership of a U.S. company poses threats to or increases vulnerability of the nation's infrastructure and assets. Although technically voluntary, foreign bidders prefer asking the CFIUS to review their deals before completing them.

"This is SoftBank clearly doing whatever it takes to satisfy the U.S. government they are not posing any national security risks. It's a pretty smart move on their part to diffuse that aspect of the problem," said Neil Juggins, a regional telecoms analyst for Hong Kong-based JI Asia, an affiliate of Societe Generale.

SoftBank shares last traded 2.1 percent higher in Tokyo, outperforming the broader index's 0.5 percent gain.

(Additional reporting by Supantha Mukherjee in Bangalore, Liana Baker and Nicola Leske in New York, Mari Saito in Tokyo and Chyen Yee Lee in Singapore; Editing by Anthony Kurian, Eric Beech, Stephen Coates and Ian Geoghegan)

OMAHA, Nebraska (Reuters) - Warren Buffett's Berkshire Hathaway Inc invests in dozens of businesses, and a new book tries to explain it all to young readers, from A to Z.

Two Omaha residents, author Nancy Rips and illustrator Tom Kerr, have teamed up on "My First Berkshire ABC" to teach children about one of the world's best-known companies, and a little about the local billionaire behind it.

More than 1,000 copies were sold at Berkshire's annual meeting on Saturday, which draws thousands of people to Omaha, and where Buffett has a say on what gets sold.

"You need something to bring home to your kids and grandkids to explain Berkshire," Rips, who has also written three books about Jewish holidays, said in a joint interview with Kerr.

Most pages show companies that Berkshire owns or invests in.

G, for example, is for "Geico," and features the car insurer's talking gecko. And W is for "Wells Fargo", and features the bank's familiar stagecoach.

The book's theme changed at Buffett's suggestion.

"Our first effort was things like, S is for sharing. Mr. Buffett believes in sharing. K is for being kind,'" Rips said.

"I got an email back from Warren saying, it's too laudatory, they will lampoon him in the news," she continued. "And I wrote a whole new proposal: A is for Acme (Brick), B is for Borsheim's (jewelry), C is for Clayton Homes, D is for Dairy Queen. I got an email back: You're in the show.'"

Kerr has worked at many newspapers and drew McGruff, the Crime Dog for the National Crime Prevention Council.

"Part of what Warren talks about is investing in things that you know," he said. "Virtually everything in here is something that somebody can relate to and touch and understand."

Berkshire Vice Chairman Charlie Munger is shown under "Q," stamping boxes of "quality" merchandise.

Rips and Kerr have not heard from Buffett on whether he likes the book. Buffett's assistant Carrie Sova had no comment on that question.

Kerr depicted Buffett just four times, including on the cover holding his usual Cherry Coke.

"This book is not all about Warren Buffett," Kerr said. "I picked my spots. He's so synonymous with Dairy Queen that I wanted him there, and obviously on the cover with Coca-Cola."

"Cherry Coke," Rips interjected.

"Yep," Kerr said. "She had me change that."

(Reporting by Jonathan Stempel; Editing by Patricia Reaney and Vicki Allen)

Boasting a strong roster with 10 players from the English Premier League, Belgium broke a 1-1 tie with three goals in the second half. It overpowered a U.S. team that has some work to do on defense before it can even think about making the field for next summer's World Cup in Brazil.

Benteke, who plays for Aston Villa, scored in the 56th and 71st minutes for Belgium, ranked 15th in the world and considered a rising European power.

Geoff Cameron scored in the 22nd minute and Clint Dempsey pounded in a penalty kick in the 80th minute for the U.S.

U.S. coach Jurgen Klinsmann figured Belgium would provide a stiff challenge for his evolving team, and while the Americans had some nice moments, the Belgians controlled the game from the outset.

Belgium took advantage of poor defense to score three of its goals.

With the score 1-1 in the 56th minute, a turnover by American midfielder Brad Davis was compounded by defender Omar Gonzalez's failure to clear the ball in front of the net. Gonzalez could have easily booted it over the touch or end line, but instead left the ball for Belgium's Kevin De Bruyne. He centered it to Benteke for an easy tap-in past goalkeeper Brad Guzan, who replaced Tim Howard in the second half.

Guzan came up with a nice save in the 64th minute, but seconds later he was fishing the ball from his net again. Fellaini, known as much for his puffy hairdo as his skills, headed his goal into the left corner off a beautiful cross by De Bruyne to make it 3-1.

In the 71st minute, Benteke streaked behind defenders DaMarcus Beasley and Matt Besler and chipped in a pass from Steven Defour.

The U.S. later cut the deficit in half when referee Jeffery Solis awarded a penalty kick after calling Toby Alderweireld for a questionable hand ball in the box.

Earlier, while being outplayed and unable to get off a shot, the U.S. tied it 1-1 in the 22nd minute on Cameron's first international goal.

Graham Zusi sent an effective short corner kick across the goal mouth to Dempsey posted on the right side. The U.S. captain alertly headed it back over Belgium's defense to Cameron, who jumped and headed it past keeper Simon Mignolet.

Howard was tested a few more times in the first half as Belgium mounted several scoring threats and outshot the Americans 5-1 in the first 45 minutes.

The Americans also caught two fortunate breaks in the opening half.

In the 26th minute, speedy Belgian forward Romelu Lukaku's goal was waved off by an offside call. However, TV replays appeared to show Lukaku was onside.

Also, Beasley, playing in his 100th international game, might have gotten away with a hand ball when he blocked a pass inside the box.

A breakdown by the U.S. defense allowed Belgium to take a 1-0 lead in the sixth minute. De Bruyne played a through ball to speedy Lukaku, who got behind Gonzalez. Lukaku got off a quick shot from the left side that was smothered by Howard, who was unable to control the rebound. and Kevin Mirallas, Howard's teammate at Everton, scored on a nice chip into the empty net.

The early deficit gave Klinsmann a chance to see how his team would react, and for the most part, the Americans responded in the first half before being outscored 3-1 in the second half.

Outside the home of the Cleveland Browns, parking lots normally crammed on NFL Sundays with fans were packed with tailgaters, some of whom kicked around soccer balls before heading inside for the match. The announced attendance was 27,720. The Browns are hoping to host more international matches in the future, maybe even landing some top European clubs who have been visiting the U.S. in recent years.

Debbie Martin, the younger sister of Jolie's mother, died at age 61 at Palomar Medical Center in Escondido, near San Diego.

Her husband, Ron Martin, told Britain's Sky News that his wife had the same defective BRCA1 gene as Jolie.

Jolie's mother, Marcheline Bertrand, died of breast cancer in 2007 at age 56.

On May 14, Jolie, the Oscar-winning film star, revealed she had a double mastectomy in an article in the New York Times, saying she hoped her story would inspire other women fighting the life-threatening disease.

Jolie, 37, is raising a family with fellow actor and fiance Brad Pitt. She wrote that she went through with the operation in part to reassure her six children that she would not die young from cancer, as her own mother did.

"We often speak of 'Mommy's mommy,' and I find myself trying to explain the illness that took her away from us. They have asked if the same could happen to me," wrote Jolie.

"I have always told them not to worry, but the truth is I carry a 'faulty' gene."

The actress, who won an Oscar as best supporting actress for her 1999 role in the film "Girl, Interrupted," said she opted for the surgery after her doctors had estimated she had an 87 percent risk of breast cancer and 50 percent risk of ovarian cancer, due to an inherited genetic mutation.

(Reporting by Jane Sutton and Daniel Trotta; Editing by Peter Cooney and Bill Trott)

ASPEN, Colo. (AP) -- The image was chilling: Snowmobile rider Caleb Moore, launched over his handlebars on a backflip gone wrong, rolled down the landing hill with his 450-pound machine somersaulting behind him.

Run over by his sled, Moore lay on the snow for several minutes before being helped off the course. As of Wednesday, he was hospitalized in critical condition because of bleeding around his heart and a complication involving his brain.

Moore's was the worst accident at the Winter X Games, which wrapped up Sunday night after four days of competition, but it wasn't the only harrowing moment. The wipeouts included a runaway snowmobile that sent spectators scrambling.

Even the highlights were hardly tame. Snowboarding star Shaun White soared a competition record 24 feet into the air during the superpipe competition, and fellow boarder Elena Hight showed off a difficult trick called a"double alley-oop backside rodeo" that involved a couple of backflips and a 180-degree rotation. It had never been seen in a competition.

All that, plus Moore's crash, has some wondering whether dialing up the difficulty each year improves action sports or has simply made them too dangerous.

"Should we be asking these questions? We absolutely should be," said Dan Lebowitz, the executive director of Sport in Society at Northeastern University, which examines the role of sports to promote healthy development and social responsibility.

The people performing these superhuman feats "really are just human," he said. "How do we maintain safety in that progression when that progression sometimes pushes every envelope to some amazingly extreme point?"

Moore's injuries underscore the dangers at Winter X, which was filled with numerous cover-your-eyes crashes.

Halldor Helgason of Iceland over-rotated on a flip in the snowboard big air competition and had to be taken off on a sled with a concussion. Rose Battersby of New Zealand sustained a lumbar spine fracture in a wipeout during practice before the skiing slopestyle competition, which will be an Olympic sport next winter at the Sochi Games.

Then there was this: Summer X Games motocross champion turned snowmobile newcomer Jackson Strong tumbled off his machine during the best trick competition, the throttle sticking and the sled swerving toward fans as they scurried away. The machine came to a rest when it got tangled in some netting and no one was seriously hurt.

Such a scenario had already crossed the mind of Levi LaVallee, a snowmobiler who captured two gold medals only to be sidelined for the final two competitions after tearing a muscle in his back.

"I've always thought about, 'What happens if the thing tips over and the throttle sticks?'" LaVallee said. "It was good, though, because it showed that X Games has a good setup with the fencing."

Whether action sports are too dangerous is an issue that's been raised before.

When freestyle skier Sarah Burke died in a training accident a little more than a year ago in Park City, Utah, there were questions about the halfpipe. Before that, the sport was examined when snowboarder Kevin Pearce suffered a severe brain injury in a fall in the same pipe as Burke two years earlier. Pearce has recovered and served as an analyst at Winter X.

But in general, the athletes accept the risks and defend their disciplines.

"To lose Sarah was such a blow to this entire industry," said snowboarder Gretchen Bleiler, who didn't compete this year as she recovers from a serious eye injury she suffered in training. "This sport brings so much joy, happiness and balance to my life and that far outweighs what could happen. You can't ever live your life with what could happen."

In a statement, X Games officials said they've paid close attention to safety issues over the event's 18-year history: "We've worked closely with athletes, risk management specialists, sport organizers and event managers to present the best possible experience for athletes and spectators. Further measures are constantly being evaluated."

Athletes say they prepare as best they can by trying out new tricks into foam pits and air bags set up at the bottom of courses. But even all the caution in the world can't prevent the fact that sometimes well-practiced maneuvers can go wrong in the air.

"You don't want to live your life in fear because of a situation," LaVallee said. "Look, I'm driving down the road right now and the worst-case scenario is a car could swerve over into my lane and run over me there it is, end of the road.

"That's kind of the same thing we think when we're competing. Hopefully, the preparation and countless hours of training and practicing will prevent the worst-case scenario from happening."

Tucker Hibbert the Shaun White of snowmobiling after winning his sixth straight SnoCross title just hopes casual fans understand that what they see on television is not true snowmobiling.

"You're seeing the most extreme side of what we do," Hibbert said. "That's a lot different than what the average person does on a snowmobile."

Hibbert doesn't participate in events such as best trick because, "I just wasn't born with those skills. I sit back and watch those guys, enjoy what they do."

He paused.

"You just hate to see anyone crash, anyone get hurt," Hibbert said.

Moore was in the middle of an impressive run in the freestyle event when he caught the top of the hill that was serving as a landing area. He initially walked away with help and went to a hospital with a concussion.

Moore later developed bleeding around his heart and had surgery. His family said that Moore, of Krum, Texas, also had a complication involving his brain.

Colten Moore, Caleb's younger brother and defending champion in the event, separated his pelvis in a crash later that same night.

LaVallee is no stranger to horrific wipeouts.

While training for the "Red Bull: New Year. No Limits" daredevil series two years ago in Southern California, LaVallee lost control of his snowmobile high in the air and landed violently on his side, bouncing down the landing ramp. He broke ribs, cracked his pelvis, collapsed one lung and punctured the other.

But he returned the next year and jumped a record 412 feet, 6 inches.

"We're passionate about the sport that we're in," LaVallee said.

"Anyone who competes has that drive to succeed, to go bigger than the next person or be the first one to do it."

The mentality is similar throughout action sports, even if the bar keeps getting raised.

"There are going to be benchmarks set and people trying to exceed that benchmark," Lebowitz said. "That's just the essence of our society and our social culture."

The exhibition, commemorating the 50th anniversary of her death, was created by the Museo Salvatore Ferragamo in Florence last year.

Ferragamo was the actress' favorite shoemaker and she owned a dozen pairs of his hand-made shoes.

Curator Jan Trestik said a truck carrying mannequins and photographs was raided in an apparently coordinated attack in the central Czech Republic on trucks carrying luxury goods from Italy.

David Sebek, spokesman for Prague Castle, which is due to host the show, said most of the exhibits, including her dresses, had already arrived intact.

Prague police spokesman Tomas Hulan said officers were investigating the case but refused to give any details.

(Reporting by Jana Mlcochova; Additional reporting by Jason Hovet; Editing by Alison Williams)

New research found that when people have positive feelings toward climate change, such as hopefulness or excitement, they are more likely to avoid seeking information about it. Those who felt concerned, anxious or depressed about the topic, on the other hand, were more likely to seek information about it, new research shows.

The study, published recently in the journal , surveyed 736 undergraduate students. After asking them how they felt about the topic, the study then looked to see how likely they were to seek and gather more knowledge about it, said study author Janet Yang, a researcher at the State University of New York at Buffalo.

While 63 percent of Americans believe that global warming is happening, 16 percent say they don't think that it is, according to the . The rest are undecided.

Most people51 percentalso say they don't think global warming is caused by people, or don't know, according to a Pew Research Center Survey. In other words, they do not know that manmade carbon dioxide is increasing worldwide temperatures, the conclusion reached by the Intergovernmental Panel on Climate Change.

The most surprising result to Yang was that she uncovered a social "norm" to engage in information avoidanceif a person thought their peers were more likely to avoid information on the topic, then they were more likely to avoid information on it as well. Typically, as is the case with other environmental issues, social normswhat you believe other people want you to dolead people to seek more information, not less, Yang said.

"If you believe people think you should know more, you are more likely to seek out information," she said.

In this case, if a person spends time with others who avoid information about climate change, then they are more likely to do the same, she said.

The research suggests that when trying to inform people or get them to care about and do something regarding global warming, it may be useful to stir up some kind of emotional response.

"Stirring up emotion and using more visual story-tellingbased on the study I think that'd be effective at getting people to seek more information," she said. "We need to deliver a sense of urgency that can effectively stimulate emotional responses to this issue among the audience," the authors continued in the paper.

It could also be useful to portray information-seeking as responsible and favorable. Furthermore, it's important that people understand that they can do something about it; those who thought their actions have no effect were more likely to avoid seeking information, Yang said.

"Risk communication about climate change might benefit from arousing a sense of curiosity or debunking false beliefs about current knowledge so that people are not complacent with what they already know," the authors wrote.

Yang said that she cares deeply about climate change, because it will have "a huge impact on our generation and future generations." When she confronts climate change deniers, she tries to convince them that it's a real problem, if she thinks it's appropriate. But if it's a casual or dinner conversation, "I don't always engage, because I don't want to make people feel uncomfortable," she said. "But perhaps I should."