Vietnamese female soldiers from a communication unit march during the 60th anniversary celebrations of the Dien Bien Phu battle in the historic city, on 07 May 2014. (Photo by Reuters/Kham)

An Israeli child holds a rocket launcher as another holds her doll during a traditional military weapon display to mark the 66th anniversary of Israel's Independence at the West Bank settlement of Efrat on May 6, 2014 near the biblical city of Bethlehem. Israelis are marking Independence Day, celebrating the 66th year since the founding of the Jewish State in 1948 according to the Jewish calendar. (Photo by Gali Tibbon/AFP Photo)

Israelis covered with spray foam as they celebrate at the center of Jerusalem, on May 5, 2014, the Israel's 66th anniversary the Independence Day celebrations. Israel's first Prime Minister David Ben-Gurion declared the existence of the State of Israel in Tel Aviv in 1948, ending the British mandate. (Photo by Menahem Kahana/AFP Photo)

Constable Yasa Amerat (left) and Constable Craig Pearson wearing their body-worn video (BWV) cameras, ahead of a year-long pilot scheme by the Metropolitan police, at Kentish Town in London, on May 6, 2014. (Photo by Yui Mok/PA Wire)

A paramilitary policeman shouts a command during a training session at a base in Taiyuan, Shanxi province, China, May 9, 2014. (Photo by Jon Woo/Reuters)

An anti-government protester throws a gas canister back at the police during a protest against President Nicolas Maduro's government in Caracas, May 8, 2014. Venezuelan authorities arrested hundreds of youth activists who had spent weeks in camps set up in public spaces as part of protests. (Photo by Carlos Garcia Rawlins/Reuters)

A cloisonne enamel Rolex watch is displayed on the sales catalogue during an auction preview for Christie's in Geneva May 9, 2014. The enamel of the watch was amde by Marguerite Koch in 1949 and is expected to reach between CHF 500,000 and 1,000,000 (USD 560,000 to 1,100,000) when it goes on sale at an upcoming Magnificent Jewels sale in Geneva May 12, 2014. (Photo by Denis Balibouse/Reuters)

Forces loyal to Syria's President Bashar al-Assad play football at al-Hamdeya neighborhood in Homs city May 9,2014. Around 270 Syrian rebels granted safe exit under a complex deal with President Bashar al-Assad's forces are being held in Homs by the army after insurgents elsewhere failed to uphold their side of the agreement, Syrian officials said on Friday. Following a year of siege, around 1,200 rebels and residents in the Old City of Homs left the city on buses this week in exchange for the release of dozens of captives held by rebels in the northern provinces of Aleppo and Latakia. (Photo by Khaled al-Hariri/Reuters)

Children run to climb on a broken armoured vehicle of Ukrainian forces as is taken away by pro-Russian militants in Mariupol May 9, 2014. Ukrainian security forces killed about 20 pro-Russian rebels who tried to seize control of police headquarters in the eastern port city of Mariupol on Friday, the Interior Minister said. (Photo by Marko Djurica/Reuters)

Russian Police academy female cadets march during a rehearsal for the Victory Day military parade at Dvortsovaya (Palace) Square in St Petersburg, Russia, Wednesday, May 7, 2014. Victory Day, marking the defeat of Nazi Germany, is Russia's most important secular holiday celebrated on May 9. (Photo by Dmitry Lovetsky/AP Photo)

A Russian military vehicle is seen crossing a bridge on its way to a Victory Day parade rehearsal on the Dvortsovaya (Palace) embankment in St. Petersburg, Russia, 05 May 2014. Russia annually on 09 May celebrates the victory of the then Red Army over Nazi Germany. (Photo by Anatoly Maltsev/EPA)

Russian honor guards prepare to take part in a Victory Day parade rehearsal on the Dvortsovaya (Palace) Square in St. Petersburg, Russia, 05 May 2014. Russia annually on 09 May celebrates the victory of the then Red Army over Nazi Germany. (Photo by Anatoly Maltsev/EPA)

Rescue personnel work a site where a bus crashed into a house, Tuesday, May 6, 2014, in Sioux Falls, S.D. Police say the bus hit one house, then crossed the street and crashed into another house. There were no children on the bus at the time of the crash, and the bus driver, 66, was taken to the hospital with a head injury. (Photo by Joe Ahlquist/AP Photo/Argus Leader)

Kasey Kahne moves off the track into Turn 4 during the NASCAR Aaron's 312 Nationwide series race at Talladega Superspeedway, on May 3, 2014. (Photo by Dale Davis/Associated Press)

Injured people wait in an ambulance at Kenyatta National Hospital, Nairobi, on May 4, 2014. Two improvised explosive devices went off on buses along one of busiest highways in the Kenyan capital, killing one person and wounding several others, as the East African nation struggles to crack down on a recent wave of terrorist attacks. (Photo by Sayyid Azim/Associated Press)

Competitors climb on their way to Rosablanche pass, near Verbier, Switzerland, during the Glacier Patrol race Sunday 04, Mai, 2014. The Glacier Patrol (Patrouille des Glaciers) organized by the Swiss Army sees highly-experienced hiker-skiers trek across the Haute Route along the Swiss-Italian border from Zermatt to Verbier. The race covers 53km (31.8 miles) by foot and ski, with over 7000m gain and descent along the way. (Photo by Anthony Anex/EPA)

An anti-government protester goes a march to mark the 64th anniversary of the coronation of Thai King Bhumibol Adulyadej in Bangkok on May 5, 2014. Thailand's revered King Bhumibol Adulyadej made a rare public appearance on May 5 to mark the 64th anniversary of his coronation, as the political turmoil gripping his kingdom enters a critical phase. (Photo by Nicolas Asfouri/AFP Photo)

French coast rescuers support a 23-year-old Afghan trying to cross the Channel on a makeshift raft using a bedsheet as a sail, on May 5, 2014 off Sangatte. The man, who had started developing hypothermia, “was first disappointed and then glad at being rescued”, said Bernard Barron, the head of the coast rescue service in Calais. (Photo by AFP Photo/SNSM Calais)

Seattle Seahawks Sea Gals cheerleaders perform at the Seattle Seahawks NFL football draft party, Thursday, May 8, 2014 at the CenturyLink Field Events Center in Seattle. (Photo by Ted S. Warren/AP Photo)

Pro-Russian supporters demonstrate in front of Ukrainian policemen guarding the entrance of a state city building in Mariupol on May 7, 2014. (Photo by Genya Savilov/AFP Photo)

Pro-Russian supporters clash with Ukrainian policemen near the city police department, as participants of a rally attempt to release the pro-Russian supporters arrested during deadly clashes of 02 May, in the South-Ukrainian city of Odessa, Ukraine, 04 May 2014. At least 31 people died in a fire that broke out in a trade union building during clashes 02 May in Odessa, while a Ukrainian military push against separatists in eastern Ukraine stalled after two helicopters were shot down. Apart from the fire death toll, the fighting left at four people dead and 40 injured, police said. (Photo by Alexey Furman/EPA)

Russian political activists Nadya Tolokonnikova, center, and Maria Alyokhina, center left, of the Russian punk band p*ssy Riot, join Sen. Ben Cardin, D-Md., far right, the chairman of the Helsinki Commission, Sen. Jeff Flake, R-Ariz., far left, and Rep. Steve Cohen, D-Tenn., second from left, in seeking action to stop violations of human rights by pro-Russian militants in the Ukraine region, at the Capitol in Washington, Tuesday, May 6, 2014. Pyotr Verzilov, second from right, is Nadya Tolokonnikova's husband who helped to interpret. The political activists spent more than a year behind bars for performing songs critical of Russian leader Vladimir Putin. (Photo by J. Scott Applewhite/AP Photo)

Pro-Russian supporters clash with Ukrainian policemen near the city police department, as participants of a rally attempt to release the pro-Russian supporters arrested during deadly clashes of 02 May, in the South-Ukrainian city of Odessa, Ukraine, 04 May 2014. (Photo by Alexey Furman/EPA)

Russian military servicemen march during a military parade marking the 69th anniversary of the victory over the Nazi Germany in the WWII in the Red Square in Moscow, Russia 09 May 2014. (Photo by Yuri Kochetkov/EPA)

In this April 19, 2011 file photo, a wildfire threatens a house near Possum Kingdom, Texas. Global warming is rapidly turning America the beautiful into America the stormy, sneezy and dangerous, according to a new federal scientific report released Tuesday, May 6, 2014. The report emphasizes how warming and its all-too-wild weather are changing daily lives, even using the phrase “climate disruption” as another way of saying global warming. (Photo by L. M. Otero/AP Photo)

In this photo provided by North Metro Fire Rescue District, a house is on fire after a plane crashes into it, on Monday, May 5, 2014, in Northglenn, Colo. The pilot, Brian Veatch, said that he once owned the home, as indicated by property records, but said he didn't realize that's where he crashed until someone else pointed it out. Veatch tried to put out the fire with a garden hose before he was forced away by burning fuel. (Photo by AP Photo/North Metro Fire Rescue District)

A Russian serviceman aboard a tank salutes during the Victory Day parade in Moscow's Red Square, on May 9, 2014. (Photo by Grigory Dukor/Reuters)

Children play on a historical Soviet cannon during celebrations to mark Victory Day at a Soviet War Memorial in Berlin, on May 9, 2014. (Photo by Fabrizio Bensch/Reuters)

Russian Police academy female cadets march during a rehearsal for the Victory Day military parade at Dvortsovaya (Palace) Square in St Petersburg, Russia, Wednesday, May 7, 2014. Victory Day, marking the defeat of Nazi Germany, is Russia's most important secular holiday celebrated on May 9. (Photo by Dmitry Lovetsky/AP Photo)

Vatican Swiss guards line up during a swearing-in ceremony, at the Vatican, Tuesday, May 6, 2014. The ceremony is held each May 6 to commemorate the day in 1527 when 147 Swiss Guards died protecting Pope Clement VII during the Sack of Rome. (Photo by Alessandra Tarantino/AP Photo)

A new recruit raises three fingers in the sign of the trinity at a swearing in ceremony for the Vatican's elite Swiss Guard at the Cortile di San Damaso at The Vatican on May 6, 2014 in Vatican City, Vatican. The swearing in ceremony is held on May 6 every year to commemorate the 147 halberdiers who died defending the pope in 1527. (Photo by Franco Origlia/Getty Images)

A child from the Akhdam community of the large Yemeni underclass stands near jerry cans full of water outside her family's shanty in Sana'a, Yemen, 04 May 2014. Akhdam is the lowest rung in the Yemeni caste system and by far the poorest. Marginalized and shunned by mainstream society in Yemen, the servants live in small shantytowns, mostly in big cities, including Sana'a. (Photo by Yahya Arhab/EPA)

The body of a police officer, left, lies outside a police station in Mariupol, eastern Ukraine, Friday, May 9, 2014. Fighting between government forces and insurgents in Mariupol has left several people dead. (Photo by Evgeniy Maloletka/AP Photo)

Family members holding the portraits of the victims of the sunken ferry Sewol, sit on a street near the presidential Blue House in Seoul, South Korea, Friday, May 9, 2014. Family members marched to the presidential Blue House in Seoul early Friday calling for a meeting with President Park Geun-hye but ended up sitting on streets near the presidential palace after police officers blocked them. Park's office said a senior presidential official plans to meet them later Friday. (Photo by Lee Jin-man/AP Photo)

Police officers practice during a drill ahead of their peacekeeping assignment in Liberia, in Langfang, Hebei province, May 4, 2014. (Photo by Reuters/China Daily)