Police clash with residents from the Pavao-Pavaozinho shanty town, in the neighborhood of Copacabana, south of the city of Rio de Janeiro, Brazil, 24 April 2014. The death of a dancer in one of Rio de Janeiro's slums touched off violent protests and sparked an investigation on 24 April into the role that the militarized police might have played. Eight officers with the so-called militarized police appeared on 24 April before the civilian police in the case, which was causing great tension in the city only 49 days ahead of the World Cup. (Photo by Antonio Lacerda/EPA)

A fuel-station woman employee with an Indonesian traditional dress known as “kebaya“, fills petrol into a vehicle during the Kartini Day celebrations in Banda Aceh, Indonesia April 21, 2014. Kartini, a prominent Javanese and an Indonesian national heroine, regarded as a hero of education in Indonesia, is known for being a pioneer of the revival of indigenous women. Kartini Day is marked to remind women that they should contribute in the hegemonic state discourse of development. (Photo by Hotli Simanjuntak/EPA)

Daughter of Ang Kaji Sherpa, one of the victims of the Mount Everest avalanche on April 18, collapses during a cremation ceremony at Syambhu in Kathmandu, Nepal, April 21, 2014. The single deadliest accident in the history of the world's highest mountain took the lives of 16 Sherpas on 18 April 2014, leaving the Everest climbing community in a state of shock. (Photo by Narendra Shrestha/EPA)

Kites are seen in the sky during the kite flying championship at the 31st Weifang international kite festival in Weifang city, Shandong province, China, 19 April 2014. The annual kite festival begins on 19 April and attracts kite flying competitors from all over the world it is considered one of the biggest and most important kite events in the world. (Photo by Wu Hong/EPA)

A line of bicycles are left on the railings of a cemetery in Calderdale, as residents prepare for the The Tour de France will pass through on Sunday July 6th on the York to Sheffield stage. (Photo by John Giles/PA Wire)

MoD handout photo of a Russian Tu-95 Bear “H” photographed from a RAF Typhoon Quick Reaction Aircraft (QRA) with 6 Squadron from RAF Leuchars in Scotland on Wednesday April 23, 2014. British military aircraft were scrambled to investigate Russian planes which flew close to UK airspace, the Ministry of Defence (MoD) confirmed. Officials said Typhoon aircraft were dispatched from Scottish base RAF Leuchars after the Russian presence was detected. (Photo by Flt Lt. Gary Montgomery/PA Wire/MoD Crown Copyright)

A man smashes an apple with a sword placed on the head of a man wearing a knave costume during the Easter knight event on April 21, 2014 in Berlin. The easter knight event delivers an insight into medieval lifestyle. (Photo by Rainer Jensen/AFP Photo/DPA)

Masked pro-Russia protesters pelt supporters of Ukrainian presidential candidate Yulia Tymoshenko with eggs outside a regional government building in Donetsk, in eastern Ukraine April 22, 2014. U.S. Vice President Joe Biden told Russia on Tuesday that “time is short” for action on defusing the crisis in eastern Ukraine, but Moscow refused to be rushed, saying it could handle any tougher economic sanctions the West might impose. (Photo by Marko Djurica/Reuters)

A Christian pilgrim holds candles at the church of the Holy Sepulcher, traditionally believed to be the burial site of Jesus Christ, during the ceremony of the Holy Fire in Jerusalem's Old City, Saturday, April 19, 2014. The “holy fire” was passed among worshippers outside the Church and then taken to the Church of the Nativity in the West Bank town of Bethlehem, where tradition holds Jesus was born, and from there to other Christian communities in Israel and the West Bank. (AP Photo/Dan Balilty)

A woman looks over pseudonymous British graffiti artist Banksy's artwork “Brace Yourself” at the “Stealing Banksy” exhibition in London, Britain, 24 April, 2014. The exhibition explores the social, legal and moral issues surround the sale of street art. (Photo by Andy Rain/EPA)

Visitors of a downtown street cafe in The Hague are given a unique performance as Dutch soldiers participate in a flashmob during the Army Day ion the occasion of the 200th anniversary of the Royal Dutch Army, in The Hague, The Netherlands, 23 April 2014. (Photo by Bas Czerwinski/EPA)

Young people sprinkle water from buckets on each other on Easter Monday in Szczecin, Poland, 21 April 2014. Watering on Easter Monday is a tradition in Poland. (Photo by Marcin Bielecki/EPA)

A grief-fuelled moment for a father of a victim of the Sewol ferry accident, at a joint incense-burning altar set up at Ansan Olympic Memorial Hall in Ansan, south of Seoul, South Korea. 23 April 2014. Officials say about 200 people are still missing and at least 150 confirmed dead after a passenger ferry carrying hundreds of teenagers sank off the southern coast of South Korea on 16 April. Only 179 of 475 passengers and crew were rescued. Lee Joon-seok, captain of Sewol, the ferry carrying 475 passengers and crew, has reportedly been arrested. (Photo by Yang Ji-Woong/EPA)

Skye Taylor, of Columbus, Ohio, is assisted by Boston Police officers after collapsing near the end the 118th Boston Marathon Monday, April 21, 2014 in Boston. (Photo by Robert F. Bukaty/AP Photo)

People assemble a chain of colored eggs into egg boxes in an attempt to break the world record of the longest line of decorated Easter eggs (one kilometer) in the skiing resort of Chateau d'Oex, Switzerland, 21 April 2014. People use about 20,000 decorated eggs, to reach the “Egg kilometer”. (Photo by Salvatore Di Nolfi/EPA)

Armed men wearing military fatigues show a sticker with text reading “Donetsk don't listen to Kiev” during a pro-Russian rally, in the eastern Ukrainian city of Slavyansk on April 19, 2014. Pro-Russian rebels kept their grip on seized government buildings in Ukraine today, a day after Kiev struck a deal with Russia and the West aimed at easing the crisis in the ex-Soviet republic. (Photo by Kirill Kudryavtsev/AFP Photo)

Numerous kits fly above the sands during the 28th International kite festival in Berck, northern France, Friday, April 18, 2014. Kite-flyers from different countries participated in the festival. The International Kite Festival is organised in Berck-sur-Mer every April in front of some 600,000 spectators during 10 days. (Photo by Michel Spingler/AP Photo)

A member of the Kunstverein art association points to the puppet “La Demi-Poupee” (1971) by German artist Hans Bellmer during a press meeting for the exhibition “Puppets in the Classic Modern” at the Kunstverein Talstrasse e.V. in Halle/Saale, Germany, 22 April 2014. The exhibition kicks off on the opening weekend of the new Arts Hall of the Kunstverein, a 360 square meters large extension building that cost 1.5 million euros, from 25 to 27 April. (Photo by Jan Woitas/EPA)

A woman wearing an Easter bunny mask helps to hold a banner during the traditional Easter March of the German peace movement, in Berlin, Germany, 19 April 2014. Several hundred people demonstrated for peace under the motto “War is made! We stand against that” at this year's Easter March in Berlin. (Photo by Rainer Jensen/EPA)

F1 CEO Bernie Ecclestone, center, stands with his lawyers as he arrives in the court in Munich, southern Germany, Thursday, April 24, 2014. Ecclestone is charged with bribery and incitement to breach of trust “in an especially grave case” over a US$ 44 million payment to a German banker, that prosecutors allege was meant to facilitate the sale of the Formula One Group to a buyer of Ecclestone's liking. (Photo by Michaela Rehle/AP Photo)

President Barack Obama kisses first lady Michelle Obama at the annual White House Easter Egg Roll on the South Lawn April 21, 2014 in Washington, DC. (Photo by Win McNamee/Getty Images)

Joerg Beckmann watches his different kites during calm winds from east at the beach of the North Sea island Norderney, Germany, Tuesday, April 22, 2014. (Photo by Ingo Wagner/AP Photo/DPA)

Actors Alex Hassell (R) who plays Prince Hal and Trevor White, who plays Hotspur, rehearse a fight scene before the start of the matinee performance of Henry IV Part 1, April 22, 2014, in Stratford-Upon-Avon, United Kingdom. The Royal Shakespeare Company's (RSC) latest production of Henry IV Part 1 is coinciding with the 450th anniversary of the birth of William Shakespeare, April 23. (Photo by Christopher Furlong/Getty Images)

A group of men relax and drink coconut wine on a table off the beach on April 20, 2014 in Tacloban, Leyte, Philippines. People continue to rebuild their lives five months after Typhoon Haiyan struck the coast on November 8, 2013, leaving more than 6000 dead and many more homeless. Although many businesses and services are functioning, electricity and housing continue to be the main issues, with many residents still living in temporary housing conditions due to “No Build” areas preventing them from rebuilding their homes. (Photo by Chris McGrath/Getty Images)

Members of the media at the launch of 10,500 newly digitised items charting the history of Ireland during the 19th and early 20th centuries in the National Library of Ireland's online catalogue at the National Library in Dublin on April 24, 2014. (Photo by Brian Lawless/PA Wire)

A woman in a traditional costume is sprayed with water by men as members of the Marghareta Dance Group perform Easter folk traditions of the region in the Museum Village in Nyiregyhaza, 227 kms northeast of Budapest, Hungary, Monday, April 21, 2014. (Photo by Attila Balazs/AP Photo/MTI)

An Indian child looks into a water tanker as people fill up buckets with water during a water shortage in New Delhi, India, 25 April 2014. According to reports, a water shortage is affecting the Indian capital due to the country's growing population and its need for water. (Photo by Money Sharma/EPA)

Indians offer prayers on the banks of the River Yamuna, covered in industrial effluence, on Earth Day in New Delhi, India, Tuesday, April 22, 2014. People across the globe hold events to celebrate the Earth's environment and spread awareness on how to conserve its natural resources on Earth Day, observed annually on April 22. (Photo by Manish Swarup/AP Photo)

In this photo provided by NASA, the SpaceX Dragon capsule is berthed at the International Space Station Sunday April 20, 2014 as photographed by the Expedition 39 crew members onboard the orbital outpost. Two NASA astronauts aboard the International Space Station will conduct a spacewalkWednesday April 23, 2014 to replace a failed backup computer relay system on the space station's truss. (Photo by AP Photo/NASA)

Ulsan Hyundai's Lee Yong, top, and Kawasaki Frontale's Yu Kobayashi vie for the ball during their group stage soccer match of the AFC Champions League in Kawasaki near Tokyo Tuesday, April 22, 2014. (Photo by Shuji Kajiyama/AP Photo)

A performer dressed in traditional ancient Roman costume prepares to parade along the ancient Roman ruins of the Colosseum, Circus Maximus and the Roman Forum to celebrate the festivities of the Christmas of Rome, at Circus Maximus, Monday, April 21, 2014. Legend says that Rome was founded by Romulus on April 21, 753 BC in an area surrounded by seven hills. Every year the city celebrates the Birth of Rome with parades and fighting in costume, re-enacting the deeds of the great ancient Roman Empire. (Photo by Andrew Medichini/AP Photo)

Over one thousand residents of Venice participate in composing this living rosebud in St. Mark square in Venice, on occasion of the “Festa del Bocolo”, a tradition dating back to the Middle Age, Friday, April 25, 2014. On this day, which is also the day when St . Mark, patron saint of Venice, is celebrated, men traditionally give a rosebud to the women of their family and to their loved one. (Photo by Sebastiano Casellati/AP Photo)

A visitor poses for a photo next to a Doraemon model during an exhibition in Beijing April 19, 2014. The exhibition, which showcased a hundred models of the Japanese cartoon character in different poses and expressions, will run from April 19 to June 22. (Photo by Jason Lee/Reuters)

Participants perform Five-Animal Exercises, or Wuqinxi in Mandarin, a traditional Chinese fitness exercise, during a performance commemorating International Workers' Day which falls on May 1, in Bozhou, Anhui province April 25, 2014. Wuqinxi, developed by the Chinese physician Hua Tuo in the Eastern Han Dynasty (25-220 AD), was composed using a set of movements imitating the animals of tiger, deer, bear, ape, and crane. (Photo by Reuters/China Daily)