Feathers fly in the air as people take part in a pillow fight in Zlin, southeastern Moravia, Czech Republic, on April 16, 2014. With 224 people taking part, the event was the country's largest pillow fight and will get an entry in the Czech version of the Guinness Book of Records. (Photo by Radek Mica/AFP Photo)

Firefighters work to put out a fire in Valparaiso city, northwest of Santiago, April 13, 2014. At least 12 people were killed and 2,000 houses destroyed over the weekend by a fire that devastated parts of the Chilean port city of Valparaiso, as authorities evacuated thousands and sent in aircraft to battle the blaze. (Photo by Eliseo Fernandez/Reuters)

A woman pastes cow dung cakes on a wall for drying in the northern Indian city of Allahabad April, 16, 2014. (Photo by Jitendra Prakash/Reuters)

A demonstrator is detained by policemen during a protest in downtown Rome April 12, 2014. (Photo by Alessandro Bianchi/Reuters)

Japan's Prime Minister Shinzo Abe (front row, R) poses with entertainment celebrities including members of the girls' pop group HKT48, led by Rino Sashihara (middle row, 3rd L), at a cherry blossom viewing party at Tokyo's Shinjuku Gyoen park April 12, 2014. Thousands of people including entertainers, athletes and politicians were invited to the annual party hosted by Abe. (Photo by Issei Kato/Reuters)

A man carries a cutout depicting Yuri Gagarin during a celebration in St. Petersburg April 12, 2014. Russia marks Cosmonautics Day on Saturday, to celebrate the pioneering flight on April 12, 1961 that made Gagarin the first man in space. (Photo by Alexander Demianchuk/Reuters)

A Kashmiri woman supporter of the Peoples Democratic Party (PDP) laughs as she attends an election campaign rally on the outskirts of Srinagar, India, Thursday, April 17, 2014. Several separatist organizations have jointly appealed to the people of Jammu and Kashmir to boycott the Indian parliamentary elections. Nationwide voting began April 7 and runs through May 12, with results for the 543-seat lower house of Parliament to be announced four days later. (Photo by Mukhtar Khan/AP Photo)

Joseph Hulme competes in the Men's 200m Backstroke heats on day five of the British Gas Swimming Championships 2014 at Tollcross International Swimming Centre on April 14, 2014 in Glasgow, Scotland. (Photo by Clive Rose/Getty Images)

Kevin, a man accused of being a thief by civil servants at the Work Inspection office, lays in pain after being attacked by a man with a machete and sticks, in plain view of others, in Bangui, Central African Republic, Friday, April 18, 2014. Foreign journalists intervened and stopped the beating, as the crowd shouted “he is a thief, he must die”. Police arrived and took Kevin into custody. He was then taken to a local hospital for treatment under police surveillance before being brought before a prosecuting officer. (Photo by Jerome Delay/AP Photo)

Kashmiri villagers carry the body of Mohammad Amin Pandit, a rural body head of pro-Indian party, for burial during his funeral procession in Gulzarpora village, some 35 kilometers (22 miles) south of Srinagar, India, Friday, April 18, 2014. Police in Indian Kashmir say unidentified gunmen shot dead the political worker late Thursday night. (Photo by Dar Yasin/AP Photo)

A penitent takes part in the procession of the “Silencio y la Santa Cruz” brotherhood during Holy Week in Oviedo, northern Spain April 15, 2014. Hundreds of processions take place round-the-clock during Holy Week in Spain, drawing thousands of visitors. (Photo by Eloy Alonso/Reuters)

North Korean female soldiers prepare to take a commemorative photograph in front of a flower exhibition featuring North Korea's late founder Kim Il Sung in Pyongyang, in this photo taken by Kyodo on April 14, 2014 and released on April 15, 2014, on the 102nd birthday of North Korean founder Kim Il Sung. (Photo by Reuters/Kyodo)

A woman squats as she waits in a queue to cast her vote at a polling station at Sirohi district in the desert Indian state of Rajasthan April 17, 2014. India kicked off the biggest day of its mammoth general election on Thursday, with a quarter of its 815 million voters set to head to the polls during a week of fresh blows for the ruling Congress party and gains for the Hindu nationalist opposition. (Photo by Amit Dave/Reuters)

A supporter of Hindu nationalist Narendra Modi, prime ministerial candidate for India's main opposition Bharatiya Janata Party (BJP), wears a mask depicting Modi as he sits before the start of an election campaign rally in the southern Indian city of Chennai April 13, 2014. Modi on Saturday sought to blunt criticism that he is hostile to Muslims, the country's biggest minority group. (Photo by Reuters/Babu)

Family and schoolmates of missing passengers of the Sewol ferry accident hold candles during a vigil at Danwon High School in Ansan, South Korea, 17 April 2014. Nearly 300 people were still missing and at least nine confirmed dead after a passenger ferry carrying hundreds of teenagers sank off the southern coast of South Korea on 16 April. Nearly two-thirds of the 462 passengers who had been on board are feared to be trapped inside the now-submerged Sewol ferry, the coast guard said. (Photo by Yang Ji-Woong/EPA)

A woman carries bags of goods out of a supermarket that was looted during a police strike in Salvador, Bahia state, April 17, 2014. A police strike has unleashed violent crime in Brazil's third-largest city just two months before it is set to welcome hordes of soccer fans for the World Cup, adding to fears about the country's ability to ensure safety during the event. At least 22 people were killed in and around the northeastern city of Salvador after state police went on strike early on Wednesday to demand better pay and other benefits, the Bahia state government said on Thursday, prompting the federal government to dispatch troops to restore order. (Photo by Valter Pontes/Reuters)

A model displays a creation by designer Rizwan Beyg at a fashion show organized by the Pakistan Fashion Designers Council, in Lahore, Pakistan, early Monday, April 14, 2014. (Photo by K. M. Chaudary/AP Photo)

Members of the Spanish Legion carry a statue of Christ of Mena during Malaga Holy Week on April 17, 2014 in Malaga, Spain. Christian believers around the world mark the Holy Week of Easter in celebration of the crucifixion and resurrection of Jesus Christ. (Photo by Gonzalo Arroyo Moreno/Getty Images)

People, depicting soldiers, take part in a costumed reconstruction performance dedicated to the 70th anniversary of the liberation of Simferopol from fascist troops during the World War Two outside of the village of Kurtsy near Simferopol in Crimea April 13, 2014. (Photo by Maxim Shemetov/Reuters)

A Sikh boy reacts as he displays martial art skills during a religious procession ahead of the Baisakhi festival on the outskirts of Jammu April 13, 2014. (Photo by Mukesh Gupta/Reuters)

The new Solar Impulse 2 aircraft is pulled out of its base for the first time for tests with solar panels in Payerne April 14, 2014. The aircraft, which was unveiled on April 9, weighs 2.4 tons with a wingspan of 72 meter and more than 17,000 solar cells. The attempt to fly around the world in stages using only solar energy will be made in 2015. (Photo by Denis Balibouse/Reuters)

Experimental aircraft “Solar Impulse 2”, HB-SIB, is pictured during solar generator tests at the airbase in Payerne, Switzerland, 14 April 2014. The aircraft HB-SIB is the second solar plane of the Solar Impulse project. The main goal of the project is to circumnavigate the world with an aircraft, with a 72 metre wingspan, powered only by solar energy. (Photo by Laurent Gillieron/EPA)

A Nepalese reveller dances while covered in vermilion powder during the Bisket Jatra festival held in celebration of the Nepalese New Year in Thimi, some 10kms east of Kathmandu on April 15, 2014. The festival, which started on April 10 is celebrated for nine days by the ethnic Newar community in Thimi, Bhadgaun. (Photo by Prakash Mathema/AFP Photo)

Zhao Qiang walks across a street in Shenyang, Liaoning province, April 14, 2014. Zhao, a community officer of the China Disabled Persons' Federation, was diagnosed with multiple when he was two, with the resulting tumour affecting the growth of his left leg, his grandmother told local media, citing a doctor's diagnosis. His uncle modified his shoes, fitting them with stools, to allow Zhao to stand and walk. (Photo by Reuters/Stringer)

A woman covers her face with a scarf as she crosses a street amid strong wind in Shenyang, Liaoning province April 14, 2014. A blue alert for gale was issued in Shenyang on Monday, Xinhua News Agency reported. (Photo by Reuters/Stringer)

Tourists take a self portrait as PETA (People for the Ethical Treatment of Animals) activists, dressed as chicken, hold placards during a protest against the use of eggs, particularly during Easter time in front of the Brandenburg gate in Berlin April 14, 2014. (Photo by Fabrizio Bensch/Reuters)

An Afghan man who is said to be suffering from mental health problems is chained in a mud room at the Mia Ali Baba shrine, in Jalalabad province, April 14, 2014. Residents in the area believe that spending 40 days chained in isolation at the shrine can cure mental health problems. (Photo by Reuters/Parwiz)

The new Robonaut legs in the Robonaut Lab ae pictured in this NASA handout photo received April 14, 2014. NASA has built and is sending a set of high-tech legs up to the International Space Station for Robonaut 2 (R2), the station's robotic crewmember. (Photo by Bill Stafford/Reuters/NASA)

Members of a re-enactment group dressed as Vikings sail a replica Viking longboat past the Houses of Parliament in London, on April 15, 2014. The exhibition “Vikings: Life and Legend” is showing at the British Museum, and a live broadcast of the exhibition will be shown in 400 cinemas across Britain on April 24. (Photo by Luke Macgregor/Reuters)