An young attendee inspects a handgun during the 2013 NRA Annual Meeting and Exhibits at the George R. Brown Convention Center on May 4, 2013 in Houston, Texas. More than 70,000 peope are expected to attend the NRA's 3-day annual meeting that features nearly 550 exhibitors, gun trade show and a political rally. (Photo by Justin Sullivan/AFP Photo)

People walk past three men in barrel costumes holding placards against government’s social cuts during a protest called by several social groups in front of the ruling Basque Nationalist Party (PNV) headquarters in the northern Spanish city of Bilbao, on May 2, 2013. (Photo by Rafa Rivas/AFP Photo)

The ninth China International Cartoon & Animation Festival opens in Hangzhou, capital of east China's Zhejiang Province, April 28, 2013. (Photo by Peter Parks/AFP Photo)

Activists with their faces painted like badgers dance to Brian May's “The Badger Song” as they take part in a flash-mob protest against a proposed cull of the animals outside Britain's Department for Environment, Food and Rural Affairs (Defra) in London, on May 1, 2013. Animal rights activists and rock star Brian May, who did not take part in the flash-mob Wednesday, are going up against the country's cattle farmers in a bid to save Britain's native burrowers from a government-authorized cull. (Photo by Matt Dunham/Associated Press)

Seagulls fly in the sky over Rome on May 2, 2013 in this picture taken with a slow exposure. (Photo by Gabriel Bouys/AFP Photo)

Doug Owsley, division head for Physical Anthropology at the National Museum of Natural History, and Kari Bruwelheide, a forensic anthropologist at the museum, unveil the facial reconstruction next to the skull of “Jane of Jamestown” during a news conference at the National Museum of Natural History, in Washington, on May 1, 2013. Scientists announced during the news conference that they have found the first solid archaeological evidence that some of the earliest American colonists at Jamestown, survived harsh conditions by turning to cannibalism, presenting the discovery of the bones of a 14-year-old girl, “Jane” that show clear signs that she was cannibalized. (Photo by Carolyn Kaster/Associated Press)

Former Major League Baseball catcher Mike Piazza is apprehended by police as he performs his role as a gangster during a dress rehearsal for Miami City Ballet's performance of Slaughter on Tenth Avenue. Piazza has a few lines in the company's May 3 production of the ballet George Balanchine choreographed as part of the 1930's musical “On Your Toes”. (Photo by Lynne Sladky/Associated Press)

Orthodox nuns sing in the ossuary at the Pasarea monastery, outside Bucharest, Romania, during an Easter service, on May 5, 2013. The ossuary, containing mostly remains of nuns who lived at the monastery, is briefly opened on Easter night. (Photo by Vadim Ghirda/Associated Press)

A woman mourns for her family member, who was killed in a bombing Saturday, during his funeral in Karachi, on May 5, 2013. Two blasts in Pakistan's southern city of Karachi killed three people on Saturday, near the office of a political party critical of the Taliban, heightening tensions ahead of the country's historic May 11 election. (Photo by Fareed Khan/Associated Press)

A couple dressed as a bride and groom take part in the Maldon Mud Race in Maldon, Essex, on May 5, 2013. (Photo by Dan Kitwood/Getty Images)

Joel Hicks, who was raising money for the “Always With a Smile” charity, takes part in the Maldon Mud Race in Essex, England, on May 5, 2013. The race originated in 1973 and involves competitors racing around a course on the mudbanks of the river Blackwater at low tide. (Photo by Dan Kitwood/Getty Images)

A hot air balloon from a fruit juice company called Nudie flies over Sydney Harbour and along the Sydney skyline, on May 6, 2013. (Photo by Rick Rycroft/Associated Press)

Firefighters participate in celebrations of Myanmar Fire Brigade Day in Yangon, on May 5, 2013. Firefighters demonstrated their skills to the public at the annual event. (Photo by Khin Maung Win/Associated Press)

A rider performs before the “Kings of the Off-road” quad bike amateur regional race in a Siberian boggy district near the village of Kozhany, some 200 km (124 miles) southwest of Krasnoyarsk, Russia, on May 2, 2013. (Photo by Ilya Naymushin/Reuters)

Dancers perform at an open audition to join the world famous Rockettes at New York City's Radio City Music hall, April 30, 2013. Hundreds of aspiring dancers try out each year for a spot with the dance company to star in the Radio City Christmas Spectacular. (Photo by Mike Segar/Reuters)

Members of Malaysia's opposition party, Parti Islam Se-Malaysia (PAS), perform a special prayer during a campaign for the upcoming general elections inside a stadium at Kota Bahru early May 3, 2013. Malaysia will hold general elections on May 5 in what could be the toughest test of the ruling coalition's 56-year grip on power in Southeast Asia's third-largest economy. (Photo by Samsul Said/Reuters)

Ram Pratap Verma, a 32-year-old aspiring Bollywood film actor, watches a film at a cinema in Mumbai May 2, 2013. Bollywood is an addiction for many; an addiction that attracts thousands of aspiring stars to the city of Mumbai. Ram Pratap Verma made the journey from his small village eight years ago, and despite carrying his whole “home” inside his bag, he is determined not to give up on his ambitions. He endeavours to watch at least one film a week at a cinema, where the silver screen keeps his dreams alive. (Photo by Danish Siddiqui/Reuters)

Russian President Vladimir Putin delivers a speech during the Grand Gala Concert at Mariinsky Theatre in St. Petersburg, May 2, 2013. (Photo by Anatoly Maltsev/Reuters)

People walk past a car decorated as a royal carriage in Amsterdam, Netherlands, on April 28, 2013. Queen Beatrix announced she will relinquish the crown on April 30, after 33 years of reign, leaving the monarchy to her son Crown Prince Willem Alexander. (Photo by Emilio Morenatti/Associated Press)

An ethnic Uighur man Abulajon drives his self-made motorcycle during a test in Manas county, Xinjiang Uighur autonomous region, April 27, 2013. Abulajon, a 30-year-old Uighur worker from a sewage treatment plant, spent a year making his 0.3 tonnes motorcycle measuring 4.3 metres (14 feet) in length and 2.4 metres (7.8 feet) in height, although it makes it impossible for him to drive it on the street. It cost him about 8000 yuan ($1300) to buy all the parts from salvage stations and the converted engine can power the motorcycle with a speed of 40 km per hour (24.8 miles per hour), local media reported. (Photo by Reuters/China Daily)

Jakub Koucky (R), a graduate from Jedlickuv Institute, is helped by a climber during the first ever attempt to rappel from Prague's Congress Center in a wheelchair, at an event to mark the institute's 100th founding anniversary in Prague, May 4, 2013. The institute was started by Rudolf Jedlicka a century ago to educate handicapped children. (Photo by Petr Josek/Reuters)

Palestinians help a wounded man during clashes with Jewish settlers near the Jewish settlement of Yitzhar, near Nablus, Tuesday, April 30, 2013. In the West Bank, a Palestinian man fatally stabbed an Israeli waiting at a bus stop and fired on police before he was detained by Israeli security forces, officials said. (Photo by Nasser Ishtayeh/AP Photo)

A boy with a mask and a painted face sits on a street as he takes part in an annual carnival called “Alegria por la Vida” (Joy for life) in Managua April 27, 2013. (Photo by Oswaldo Rivas/Reuters)

A Hindu devotee gets her tongue pierced with a trident as she takes part in an annual religious procession called Shitla Mata in the western Indian city of Ahmedabad April 29, 2013. Hindu devotees subject themselves to painful rituals during the religious procession to demonstrate their faith and as a penance to the deity at a temple dedicated to the goddess Shitla. (Photo by Amit Dave/Reuters)

An Israeli girl sits on a stool in a buttercup plantation, near the southern town of Kiryat Gat April 30, 2013. (Photo by Baz Ratner/Reuters)

Orthodox Christians sit outside the famous monolithic rock-cut churches during a Good Friday celebration in Lalibela May 3, 2013. (Photo by Goran Tomasevic/Reuters)

Men and women costumed as devils and witches stands besides a small train in Schierke, central Germany, Tuesday, April 30, 2013. Hundreds of costumed devils and witches meet to celebrate Walpurgis Night, a traditional religious holiday of pre-Christian origins. The event is named after St. Walburga, an English nun who helped convert the Germans to Christianity in the 8th century. (Photo by Jens Meyer/AP Photo)

A boy with a painted tiger face poses before the Grebeg Ritual in Tegallalang, Bali, Indonesia, on May 1, 2013. During the biannual ritual young members of the community parade through the village with painted faces and bodies to ward off evil spirits. (Photo by Putu Sayoga/Getty Images)

An injured woman gets treatment after an explosion in Prague, on April 29, 2013. Police said a powerful explosion has damaged a building in the center of the Czech capital and they believe some people are buried in the rubble. (Photo by Petr David Josek/Associated Press)

Dancers Brett Chenowyth, bottom, and Lana Jones from Australian Ballet perform “Dyad 1929” in a dress rehearsal from a triple bill of works called Vanguard in Sydney, Australia, Monday, April 29, 2013. Vanguard opens at the Sydney Opera House April 30 for 20 performances. (Photo by Rick Rycroft/AP Photo)

People cover their noses to block out the smell of decomposing bodies as a truck transporting unclaimed bodies from the garment factory building that collapsed, arrives for a mass burial, on May 1, 2013. The building collapse last week in the country's worst industrial disaster, killing at least 402 people and injuring 2,500. (Photo by Wong Maye-E/Associated Press)

A Bangladeshi woman weeps as she sits next to the coffin of a relative who died in a building that collapsed Wednesday in Savar, near Dhaka, Bangladesh, Sunday, April 28, 2013. A fire broke out late Sunday in the wreckage of the garment factory that collapsed last week in Bangladesh killing hundreds, with smoke pouring from the piles of shattered concrete and some of the rescue efforts forced to stop. (Photo by Kevin Frayer/AP Photo)

Concert-goers dance and gesture during a performance at the 2013 Strawberry Music Festival at Tongzhou Canal Park in Beijing, April 29, 2013. (Photo by Barry Huang/Reuters)

A man hangs colourful lanterns to celebrate the forthcoming birthday of Buddha at the Chogye temple in Seoul, South Korea, on May 3, 2013. Buddha was born approximately 2,557 years ago, and although the exact date is unknown, Buddha's official birthday is celebrated on the full moon in May, on May 17 this year. (Photo by Chung Sung-Jun/Getty Images)

A woman carries a stone cross in a cemetery in the village of Copaciu, southern Romania, on May 2, 2013. As part of a Holy Week tradition, Romanians visit, on Maundy Thursday, the graves of their loved ones, light fires and share food with community members in memory of the departed. Orthodox worshipers celebrate Easter on May 5. (Photo by Andreea Alexandru/ Mediafax)

A plane drops fire retardant near a home as firefighters battle a wildfire on Federal Indian Reservation land west of Banning, California, , on May 1, 2013, where the blaze consumed more than 1,500 acres and destroyed several homes. (Photo by Gina Ferazzi/Los Angeles Times/MCT)

Injured people leave a scene of an explosion in downtown Prague, Czech Republic, Monday, April 29, 2013. Police said a powerful explosion has damaged a building in the center of the Czech capital and they believe some people are buried in the rubble. (Photo by Petr David Josek/AP Photo)

Fans slide through the mud in the infield prior to the 139th running of the Kentucky Derby at Churchill Downs, on May 4, 2013. (Photo by T. J. Root/Getty Images)

An unidentified baby, held by a college sumo wrester, cries during Naki Sumo, or Crying Baby Contest, at Sensoji temple in Tokyo, Monday, April 29, 2013. The babies born in 2012 participated in the annual traditional ritual performed as a prayer for healthy growth of them. (Photo by Shizuo Kambayashi/AP Photo)

South Korean army soldiers yell during a military exercise in Yeong Cheon, South Korea, on May 2, 2013. (Photo by Han Jong-chan/Yonhap)

Clashes erupt between police and protesters during May Day celebrations in Istanbul, Turkey, on May 1, 2013. Police fired tear gas to disperse hundreds of demonstrators trying to break through barricades to access Istanbul's Taksim Square which the government banned a rally on the square which is undergoing major renovations. (Photo by Associated Press)

Lauren Green, Rachael Barry, Jenny Foley and Sarah Causer from the Lucy French School of Dance in Kinsale rehearse for “Damhsa”, a full length dance production performed on a purpose built stage at Riverstick Community Centre by the Lucy French School of Dance from the 23rd to 25th of May. (Photo by John Allen)

A Tibetan Buddhist monk waits with masked dancers to welcome the Dalai Lama at the Central School for Tibetans in Dalhousie, India, on April 27, 2013. (Photo by Ashwini Bhatia/Associated Press)

Miss Florida USA 2013 Michelle Aguirre throws out the ceremonial first pitch before the Marlins host the New York Mets at Marlins Park, on April 29, 2013. (Photo by Lynne Sladky/Associated Press)

A U.S. Air Force KC-135 tanker aircraft wreckage is strewn across a field near the village of Chaldovar, about 100 miles (160 kms) west of the Kyrgyz capital Bishkek, Friday May 3, 2013. The emergencies ministry in Kyrgyzstan says a US military plane has crashed in the country. Kyrgyzstan hosts a US base that is used for troops transiting into and out of Afghanistan and for C-135 tanker planes that refuel warplanes in flight. (Photo by Vladimir Voronin/AP Photo)

Police officers detain a demonstrator in Moscow's Red Square, during an action in support of opposition activists arrested in a massive anti-president Putin rally last May, on April 27, 2013. (Photo by Ivan Sekretarev/Associated Press)

Tourists pass by members of the French branch of the international anti-fur group «CAFT» (The Coalition to Abolish the Fur Trade) as they demonstrate to denounce the breeding and use of animal for fur production, on the Promenade des Anglais in Nice, on April 27, 2013. (Photo by Lionel Cironneau/Associated Press)

Rescue workers evacuate a survivor found in the rubble of the collapsed building in Savar, Bangladesh, on April 27, 2013. (Photo by Ismail Ferdous/Associated Press)

Hilman Imp enthusiasts drive their vehicles outside the former car factory as they celebrate the car's 50th anniversary in Linwood, Scotland, on May 3, 2013. (Photo by Jeff J. Mitchell/Getty Images)

C. J. Richards, 6, salutes while his aunt, Sgt. Ashley Corey, prepares for deployment to Afghanistan as the Michigan Army National Guard Charlie Company 3/238th General Support Aviation Battalion leaves Grand Ledge, on May 1, 2013. Behind C.J., Corey's mother, Della Corey, comforts Aaryon Johnson, 3, a niece of Sgt. Corey. (Photo by Rod Sanford/The State Journal)

Children play with giant soap bubbles in downtown promenade of Krakowskie Przedmiescie in Warsaw, Poland, Saturday, May 4, 2013, one of many forms of entertainment offered to the residents during a long weekend of national holidays. (Photo by Czarek Sokolowski/AP Photo)

The demolition by use of controlled explosives of the Red Road block of flats in Glasgow, on May 5, 2013. (Photo by David Cheskin/PA Wire)

The sun's rays strike the rocky coast of Acadia National Park, in Maine, on May 2, 2013. A federal budget-related delay has pushed back the opening of many of the park's seasonal facilities until May 17. Acadia saw a 5 percent funding cut of it's roughly $7.8 million budget on March 1. The cut represented the National Park Service's share of federal sequestration. (Photo by Robert F. Bukaty/Associated Press)

Somali security force members carry away a wounded civilian following a suicide car bomb blast in the capital Mogadishu, Somalia Sunday, May 5, 2013. A Somali police official at the scene said four civilians and a soldier were killed after the suicide bomber attempted to ram a car laden with explosives into a military convoy. (Photo by Farah Abdi Warsameh/AP Photo)

Lead singer Shingai Shoniwa performs with the Noisettes in the Big Top at the Cheltenham Jazz Festival, Gloucestershire, on May 4, 2013. (Photo by Tim Ireland/PA Wire)

This photo released by the Syrian official news agency SANA, shows Syrian fire fighters extinguishing burning cars after a car bomb exploded in the capital's western neighborhood of Mazzeh, in Damascus, Syria, Monday, April. 29, 2013. State-run Syrian TV says the country's prime minister has escaped an assassination attempt when a bomb went off near his convoy. The TV says Prime Minister Wael al-Halqi was unhurt in the attack in the capital's western neighborhood of Mazzeh. (Photo by AP Photo/SANA)

Brunner Waterman, 15, crushes a Ford Taurus with owner Todd Liebross, supervising at Tank Town USA, a heavy equipment playground where you can drive tanks and crush cars in Morganton, Ga., on April 28, 2013. The experience was a surprise gift from his parents Eric & Heather Waterman who brought their two sons and a friend from Laurens, S.C., to make a life long memory. (Photo by Curtis Compton/AJC)

A woman views a full scale replica cave from the 8th century that contains the Bodhisattva of the Mogao Caves, in “Dunhuang: Buddhist Art at the Gateway of the Silk Road”, at the China Institute, in New York, Tuesday, April 24, 2013. (Photo by Richard Drew/AP Photo)

This April 20, 2013 NASA handout image shows Saunders Island and Wolstenholme Fjord with Kap Atholl in the background seen during an IceBridge survey flight near Qaasuitsup, Greenland. Sea ice coverage in the Fjord ranges from thicker, white ice seen in the background, to thinner grease ice and leads showing open ocean water in the foreground. (Photo by NASA HO via Michael Studinger/AFP Photo)

Lava flows during an eruption of Mt. Etna as seen from the village of Acireale, near the Sicilian town of Catania, Italy, on April 27, 2013. (Photo by Carmelo Imbesi/Associated Press)

Solar Impulse co-founder, pilot and CEO Andre Borschberg, left, greets pilot Bertrand Piccard at Sky Harbor International Airport in Phoenix, early Saturday, May 4, 2013, after completing the first leg of its coast-to-coast flights across the United States. It is the first time that a solar airplane capable of flying day and night without fuel, will attempt to fly across America. Solar Impulse began its journey Friday in San Francisco in its attempt to reach New York. (Photo by AP Photo/Scuteri)

Spanish Moto2 rider Jordi Torres of Mapfre lifts his front wheel during the first free practice session of the Spain MotoGP at the Jerez race track in Spain, ahead of Sunday's Spanish Motorcycle Grand Prix, on May 3, 2013. (Photo by Miguel Angel Morenatti/Associated Press)

Beltane Fire Society performers celebrate the coming of summer during the Beltane Fire Festival on Calton Hill in Edinburgh, Scotland, on April 30, 2013. (Photo by Jeff J. Mitchell/Getty Images)

Supporters of Pakistan's former cricket star-turned-politician Imran Khan run for cover as a helicopter carrying their leader leaves after his election campaign rally in Charsadda, on May 4, 2013. Pakistan is scheduled to hold parliamentary elections on May 11, the first transition between democratically elected governments in a country that has experienced three military coups and constant political instability since its creation in 1947. (Photo by Mohammad Sajjad/Associated Press)

The sun rises over St Mary's Lighthouse at Whitley Bay, North Tyneside, May 2, 2013. (Photo by Owen Humphreys/PA Wire)

Colorful carp streamers flutter in the air over the Sagami River in Sagamihara, west of Tokyo, ahead of the Children's Day national holiday on Sunday, on May 4, 2013. It is a national tradition in Japan to fly carp streamers on Children's Day. (Photo by Itsuo Inouye/Associated Press)

Participants in the “Barjot Run” make their way through the mud in Biere, Switzerland, on May 4, 2013. (Photo by Laurent Gillieron/Keystone)

Worshipers light candles lit from a flame that emerged from the tomb believed to be of Jesus Christ as they take part in the ceremony of the holy fire at the Church of the Holy Sepulcher in Jerusalem, Israel, on May 4, 2013. (Photo by Lior Mizrahi/Getty Images)

Korean pop star PSY dances for fans as the Los Angeles Dodgers play the Colorado Rockies in Los Angeles, on April 30, 2013. (Photo by Mark J. Terrill/Associated Press)