A woman throws a rock and a bag at policemen who block her way home in Peru's Madre de Dios region, on March 28, 2014. Soldiers, police and marines have begun enforcing a ban on illegal gold mining in Peru's southeastern jungle region, and miners clashed with police while intermittently blocking traffic on the Interoceanic Highway that links the Pacific with Brazil. (Photo by Rodrigo Abd/Associated Press)

Workers raise utility wires to make room for the 747 Shuttle Carrier Aircraft as it makes a left-hand turn from a side road adjacent to Texas State Highway 3 to NASA Parkway Tuesday, Apr. 29, 2014 in route to Space Center Houston where it will become a permanent exhibit at the center in Houston, Texas. (Photo by Kirk Sides/AP Photo/The Courier)

Emer Galvin Garry (12) and traditional dancer Saptha Raman Namboothiri (13) are pictured at the CHQ, Dublin, to raise funds for Global Schoolroom and to launch their 2014 volunteer programme, on April 30, 2014. The Global Schoolroom programme seeks to promote the sharing of educational experience between communities worldwide to help eradicate poverty, promote economic development and build sustainable communities. (Photo by Mark Stedman/Photocall Ireland)

An Afghan child looks on as he works at a coal mine which collapsed on April 30 killing some 40 miners and trapping an unknown number of others in the Dar-i- Suf district of Samangan province, some 200 kms from Mazar-e-Sharif on May 1, 2014. Officials at the site in Samangan province said an explosion inside the mine on April 30 killed some 40 miners and trapped an unknown number of others. (Photo by Farshad Usyan/AFP Photo)

A North Korean soldier stands guard along the bank of Yalu River near the North Korean town of Sinuiju, opposite the Chinese border city of Dandong, May 1, 2014. (Photo by Jacky Chen/Reuters)

Members of the Kurdish Peshmerga force show their ink-stained fingers in the northern Kurdish city of Arbil on April 28, 2014, after casting her ballot in special voting ahead of Iraq's first election since US troops withdrew. Suicide bombers attacked several polling stations and security forces in Iraq today killing at least 18 people and wounding dozens, police said, days before the violence-wracked country holds legislative elections. (Photo by Safin Hamed/AFP Photo)

Chilean workers take part in the May Day parade organized by the Chilean Union Workers (CUT) in Santiago, on May 1, 2014. (Photo by Martin Bernetti/AFP Photo)

A pro-Russia activist holds a flag depicting Stalin with a machine gun in his hands reading “Death to fascism!” during a rally of the Russian Block marking May Day in the eastern Ukrainian city of Donetsk on May 1, 2014. Some 100,000 workers on May 1 paraded on Red Square for the first time since the 1991 Soviet breakup as the takeover of Crimea triggered a surge of patriotism and boosted Russian President Vladimir Putin's standing. (Photo by Alexander Khudoteply/AFP Photo)

A bare-chested activist shouts slogans as she is evacuated by police outside the Egyptian embassy in Paris on April 30, 2014 during a demonstration against death sentences handed by an Egyptian court to 683 alleged Islamists. (Photo by Eric Feferberg/AFP Photo)

Newlyweds pose for photos near a carousel at a park during China's national May Day holidays in Beijing, on May 2, 2014. (Photo by Alexander F. Yuan/Associated Press)

The relative of a woman that recently gave birth yesterday to twins holds one of the babies before departing towards Chad's border, escorted by troops from the African Union operation in CAR (MISCA) in the northern town of Kaga Bandoro April 29, 2014. Of the remaining Muslims that have been sheltered from sectarian violence in the neighbourhood of PK12 in Bangui, over one thousand have been evacuated towards the northern town of Kabo and Sido on the border with Chad. (Photo by Siegfried Modola/Reuters)

A woman straightens her hair as riot policemen stand in position during clashes within the first day of a national strike by farmers protesting against the government for alleged unpaid benefits, on April 28, 2014 in Bogota. (Photo by Luis Acosta/AFP Photo)

Russian honor guard prepare to take part in a Victory Day parade rehearsal on the Dvortsovaya (Palace) Square in St. Petersburg, on April 28, 2014. Russia celebrates the 1945 victory over Nazi Germany on May 9. (Photo by Olga Maltseva/AFP Photo)

An upturned truck lies under a tree that has lost most of its branches, following a tornado near Vilonia, Arkansas, at sunset April 28, 2014. On a second day of ferocious storms that have claimed at least 19 lives in the southern United States, a tornado tore through the Mississippi town of Tupelo on Monday causing widespread destruction to homes and businesses, according to witnesses and local emergency officials. Most of the deaths from the violent storms occurred on Sunday when tornadoes tossed cars like toys in Arkansas and other states. (Photo by Carlo Allegri/Reuters)

Mexican immigrants adjust their costumes as they prepare to parade through the streets of south Philadelphia, Pennsylvania during the annual Carnaval de Puebla, a traditional Mexican carnival celebration that re-enacts the Battle of Cinco de Mayo, April 27, 2014. Revelers carry mock rifles as they dance and drink in elaborate costumes representing the different armies that fought in the historic battle. This year, more than 400 participants came from all over the tri-state area, according to event organizers, making the Carnaval de Puebla in Philadelphia the largest such event outside of Mexico. (Photo by Charles Mostoller/Reuters)

Grace Hernan (9) and Grace Campbell (9) pictured nervously await the results of the National Competition for Schools in Cork city hall, part of the Cork International Choral Festival, on April 30, 2014. Their choir was unsuccessful. (Photo by Daragh Mc Sweeney/Provision)

Anti-riot policemen face demonstrators in Turin during one of several rallies against unemployment and austerity in Italy for May Day, on May 1, 2014. Activists lobbed smoke bombs at police, who charged against the demonstrators in an industrial city that has been badly hit by a painful two-year recession. Thousands also took part in a peaceful demonstration called by the main trade unions in Pordenone, where the closure of a nearby washing machine plant owned by Sweden's Electrolux is putting 1,300 jobs at risk. (Photo by Marco Bertorello/AFP Photo)

A Palestinian girl sits as she waits to be given the permission to cross into Egypt at the Rafah crossing in the southern Gaza Strip on April 29, 2014. The Gaza Strip's land border with Egypt reopened after a 29-day closure, but only for two days and then just for special cases, the Palestinian territory's Islamist rulers Hamas said. (Photo by Said Khatib/AFP Photo)

A protester, with cream applied to his face to protect against tear gas, reacts during a May Day demonstration in Istanbul May 1, 2014. Turkish police fired tear gas, water cannon and rubber pellets on Thursday to try to stop thousands of people, some armed with fire bombs and fireworks, from defying a ban on May Day rallies and reaching Istanbul's central Taksim square. (Photo by Umit Bektas/Reuters)

A volunteer helps burn debris from a destroyed house in Vilonia, Ark., Wednesday, April 30, 2014. A tornado struck the town late Sunday. Along stretches of damaged houses, volunteers with chain saws cleared trees from across homes, driveways and streets. (Photo by Danny Johnston/AP Photo)

Pro-Russian men watch as a woman enters the mayor's office in the town of Slaviansk, east Ukraine May 1, 2014. (Photo by Baz Ratner/Reuters)

Protesters throw gas bombs toward riot police during a May Day demonstration in Istanbul, on May 1, 2014. Turkish police fired a water cannon and tear gas in an attempt to prevent hundreds of protesters from defying a ban on May Day rallies and reaching Istanbul's central Taksim Square, the focal point of protests last summer. (Photo by Burak Kara/Getty Images)

Pro-Russian armed men take cover behind a car near the local police headquarters in Luhansk, eastern Ukraine, April 29, 2014. Pro-Russian separatists in Ukraine opened fire with automatic weapons and threw stun grenades at the local police headquarters in the eastern city of Luhansk on Tuesday, a Reuters photographer said. (Photo by Vasily Fedosenko/Reuters)

Lempertz auction house representative Christine de Schaetzen sits in the Soviet space capsule “Vozvrashchayemyi Apparat” in Brussels, on April 29, 2014. The estimated value of the space capsule that went twice into space in 1977 and 1978, is between $968,450 and $1.9 million. it will be auctioned on May 7. (Photo by Yves Logghe/Associated Press)

Juventus' French midfielder Paul Labile Pogba controls the ball during the UEFA Europa League semifinal football match Juventus vs Benfica on May 1st, 2014 at the Juventus Stadium in Turin. (Photo by Giuseppe Cacace/AFP Photo)

Pro-government Comunist (L) and anarchist (R) movement demonstrators clash during May Day demonstration in Santiago, May 1, 2014. (Photo by Ivan Alvarado/Reuters)

Maicon de Jesus Dias throws a ball he recovered from an open grave while playing soccer with in a makeshift field in a local cemetery of the city of Una, Bahia state, April 29, 2014. Brazil will host the 2014 World Cup starting June 12. (Photo by Roosevelt Cassio/Reuters)

Udomsak Ratanotayo, left, and Suttinan Boonsomkiat wear storm trooper costumes while donating blood at the Thai Red Cross in Bangkok, Thailand on Monday, April 28, 2014. Thai Star Wars fans will donate blood and give toys at an orphanage as part of a promotional campaign. (Photo by Sakchai Lalit/AP Photo)

Sub-Saharan migrants drink water as they sit on Spanish soil after jumping a metallic fence that divides Morocco and the Spanish enclave of Melilla, Thursday, May 1, 2014. Spain says around 700 African migrants have rushed its barbed wire border fences in the North African enclave of Melilla, and although police repelled most, 140 managed to enter Spanish territory. The migrants charged the fences in two waves, with 500 arriving in the early hours and another 200 later Thursday morning. Spain and Morocco stepped up border vigilance in Feb. when 15 migrants drowned trying to enter Spain's other north African coastal enclave, Ceuta. (Photo by Fernando Garcia/AP Photo)

A police officer stands guard next to a grafffiti of Colombian President Juan Manuel Santos during a May Day protest on May 1, 2014, in Bogota, Colombia. (Photo by Guillermo Legaria/AFP Photo)

A protester uses a slingshot toward riot police in Istanbul, Turkey, Thursday May 1, 2014. Clashes erupted between May Day demonstrators and riot police as crowds determined to defy a government ban tried to march to the city's iconic Taksim Square. Security forces pushed back demonstrators with water cannons and tear gas. (Photo by Emrah Gurel/AP Photo)

A couple on their wedding day poses at the barricades in the center of Donetsk in downtown of Donetsk, Ukraine, 02 May 2014. Injuries were reported the previous day after separatist forces swept aside security forces and stormed a government building, this time in the disputed eastern Ukrainian city of Donetsk. (Photo by Igor Kovalenko/EPA)

A visitor takes picture of a silicon life-size statue of late General Vo Nguyen Giap whose troops defeated French at Dien Bien Phu battlefield in 1954, at an exhibition held at Hanoi's Army Museum on April 29, 2014. Vietnam will celebrate next week the 60th anniversary of the Dien Bien Phu battle. (Photo by Hoang Dinh Nam/AFP Photo)

This undated picture released from North Korea's official Korean Central News Agency (KCNA) on April 27, 2014 shows North Korean leader Kim Jong-Un (C) inspecting a shelling drill of a long-range artillery sub-unit tasked to hit major targets in the southwestern waters at undisclosed place in North Korea. North Korean leader Kim Jong-Un carried out a rash of visits to military installations and chaired a meeting of senior figures in the armed forces, state media said, amid global unease over a possible nuclear test. (Photo by AFP Photo/KCNA via KNS)

Bosnian pensioner Momir Bojic cleans his wooden Volkswagen Beetle car in front of his home in Celinac near Banja Luka, April 2, 2014. Bojic,71, an avid Volkswagen fan, created the car from over 50,000 separate pieces of oak and took two years to complete it. German carmaker Volkswagen posted a quarterly jump in operating profit as Europe's fledgeling economic recovery lifted sales of Audi and Porsche luxury models to record levels. First-quarter underlying earnings at Europe's biggest carmaker gained 22 percent to 2.9 billion euros ($4 billion), compared with 2.3 billion a year ago, VW said on April 29, 2014. (Photo by Dado Ruvic/Reuters)

A paraglider of Greenpeace flying above the Russian oil tanker Michail Ulyanov with a banner with the words “No Arctic Oil!” near the harbour of Rotterdam, 1 May 2014. The environmental organisation is demonstrating against the ship carrying the first oil from the Arctic Sea to Rotterdam. (Photo by Ruben Neugebauer/Getty Images)