Palestinian female Hamas security officers demonstrate their skills during a graduation ceremony in the northern Gaza Strip, Wednesday, April 2, 2014. 1200 officers graduated from advanced training courses that lasted one year in Gaza police academy of Hamas. (Photo by Adel Hana/AP Photo)

A woman poses for a picture for a friend (not pictured) while sitting on cracks on the road leading to Alto Hospicio commune, after a series of aftershocks, in the northern port of Iquique, Chile, on April 3, 2014. A powerful 7.6-magnitude earthquake struck off northern Chile late on Wednesday but there were no reports of damage and a precautionary tsunami alert along the coast and in neighboring Peru was called off. (Photo by Ivan Alvarado/Reuters)

Supporters of Afghan presidential candidate Ashraf Ghani cheer during an election campaign in Kabul April 1, 2014. The Afghan presidential elections will be held on April 5. (Photo by Mohammad Ismail/Reuters)

Thai Prime Minister Yingluck Shinawatra greets people after casting a ballot at a polling station in Bangkok March 30, 2014. Thais voted on Sunday for half of the country's 150-seat Senate in a key test for Yingluck's troubled government, a day before the prime minister is due to defend herself against negligence charges over a disastrous rice subsidy scheme. (Photo by Chaiwat Subprasom/Reuters)

A participant reacts as she gets hit in the face with coloured powder during the Holi Festival of Colours organised by the Maltese Indian community in Qormi, outside Valletta, March 30, 2014. The Holi festival, marking the passing of winter to spring, was delayed by a few days to avoid clashing with students' examinations, according to organisers. (Photo by Darrin Zammit Lupi/Reuters)

An Afghan girl holds a mannequin as she and her playmates look on in the old part of the northwestern city of Herat on March 31, 2014. Presidential candidates have been holding election rallies across the country for the the upcoming presidential elections on April 5, to choose a successor to President Hamid Karzai, who was barred constitutionally from seeking a third term. (Photo by Behrouz Mehri/AFP Photo)

Supporters of Afghan presidential candidate Abdullah Abdullah ride their motorcycles, as they lead his convoy after his arrival to attend an election campaign in Herat province April 1, 2014. (Photo by Zohra Bensemra/Reuters)

An Afghan boy carries election material on his back to polling stations which are not accessible by road in Shutul, Panjshir province, April 4, 2014. (Photo by Ahmad Masood/Reuters)

Adisorn Gronski, left, prays while monks from the Atammayatarama Buddhist Monastery in Woodinville chant for victims of the deadly mudslide in Oso, Wash., Tuesday, April 1, 2014, near a road block in Oso. The March 22 mudslide destroyed the rural mountainside community northeast of Seattle. (Photo by Sofia Jaramillo/AP Photo/The Herald)

A woman reacts as she listens to a fortune telling machine at a beach along the Arabian Sea in Mumbai April 2, 2014. (Photo by Danish Siddiqui/Reuters)

Anti-government demonstrators pretend to bat gas canisters to police during riots in Caracas April 1, 2014. Venezuelan troops dispersed opposition demonstrators with teargas on Tuesday and blocked anti-government activist Maria Corina Machado, recently stripped of her seat in the National Assembly, from reaching the legislature. (Photo by Christian Veron/Reuters)

People run and shout slogans as they march towards the Portuguese parliament during a protest by Portuguese university students in Lisbon, Wednesday, April 2, 2014. The protest was against cuts in the public education system. The white banner on the right with the faces of the Portuguese Prime Minister Pedro Passos Coelho and the Portuguese President Anibal Cavaco Silva reads in Portuguese: “Out”. (Photo by Francisco Seco/AP Photo)

An Afghan woman carries her child as she walks in a narrow alley in Mazar-i-Sharif April 3, 2014. (Photo by Zohra Bensemra/Reuters)

Fishermen inspect a boat washed onto a dock after a tsunami hit the northern port of Iquique April 2, 2014. An earthquake, with a magnitude of 8.2, struck off the coast of northern Chile near the copper exporting port of Iquique on Tuesday evening, killing six and triggering the tsunami that pounded the shore with 2-meter (7-foot) waves. (Photo by Hector Merida/Reuters)

A man walks on a pole before the start of a campaign by Afghan presidential candidate Abdullah Abdullah in Panjshir province March 31, 2014. (Photo by Ahmad Masood/Reuters)

Children wear outfits from the children's brand Lilica Ripilica during the Sao Paulo Fashion Week in Sao Paulo, Brazil, Thursday, April 3, 2014. (Photo by Andre Penner/AP Photo)

An artist's impression of solar-powered pathways that shine at night which could help reduce street lighting in future cities as future “green” cities could resemble fairylands filled with radiant buildings and glowing trees. The bright vision of environmentally friendly cities was unveiled by Arup, the engineering and design consultancy behind London's Garden Bridge project. (Photo by Pro-Teq Surfacing/PA Wire)

An anti-government activist clashes with riot police during a protest in Caracas on April 1, 2014. In a direct challenge to President Nicolas Maduro, prominent opposition politician Maria Corina Machado vowed to take her seat in the National Assembly despite her ouster by the Supreme Court. The head of the legislative body had ordered Machado expelled and her parliamentary immunity stripped last week after she tried to speak before the Organization of American States about her country's crisis. (Photo by Federico Parra/AFP Photo)

An Afghan girl helps her brother down from a security barrier set up outside the Independent Election Commission (IEC) office in the eastern Afghan city of Khost, Thursday, April 3, 2014. (Photo by Anja Niedringhaus/AP Photo)

Shakira attends “The Voice” Red Carpet Event at The Sayers Club on Thursday, April 3, 2014, in Los Angeles. (Photo by Annie I. Bang /Invision/AP Photo)

North Korean leader Kim Jong Un (C) smiles as he stands with commanding officers of the combined units of the Korean People's Army (KPA) in this undated photo released by North Korea's Korean Central News Agency (KCNA) in Pyongyang April 2, 2014. (Photo by Reuters/KCNA)

Community policemen arrest one of the seven alleged killers of another community policeman at the Parotillas village in Acapulco, Mexico, on April 4, 2014. (Photo by Pedro Pardo/AFP Photo)

People embrace on the upper floor of an apartment building located a few blocks from the coast where they gathered to avoid a possible tsunami after an earthquake in Iquique, Chile, Tuesday, April 1, 2014. A powerful magnitude-8.2 earthquake struck off Chile's northern coast Tuesday night. There were no immediate reports of injuries or major damage, but buildings shook in nearby Peru and in Bolivia's high altitude capital of La Paz. (Photo by Cristian Viveros/AP Photo)

Men drive a car near a site hit by what activists said was an air strike by government forces in Aleppo's al-Ansari al-Sharqi neighbourhood April 2, 2014. (Photo by Ammar Abdullah/Reuters)

This Monday, March 31, 2014 photo provided by Allegheny Health Network shows an X-ray of a chain saw blade embedded in the neck of a patient, at Allegheny General Hospital, in Pittsburgh. James Valentine, a tree trimmer, was in a tree on Monday afternoon when he was struck in the neck by the saw. Another worker helped him down, and his co-workers left the saw in place to try to limit the bleeding. Valentine had emergency surgery and is recovering. (Photo by AP Photo/Allegheny Health Network)

In this photograph taken on April 1, 2014, a motorcycle laden with Afghan and Iranian carpets transports them to the shops in the northwestern city of Herat. Carpets are Afghanistan's best-known export, woven mostly by women and children in the north of the country, a trade which once employed, directly or indirectly, six million people, or a fifth of the country's population, but that figure has dropped sharply. (Photo by Ehrouz Mehri/AFP Photo)

Racegoers arrive for “Ladies Day” at the Grand National horse race meeting at Aintree in Liverpool, northwest England, on April 4, 2014. The annual three day meeting culminates in the Grand National which is run over a distance of four miles and four furlongs (7,242 metres), and is the biggest betting race in the United Kingdom. (Photo by Ndrew Yates/AFP Photo)

Vintage planes from the Cavanaugh Flight Museum flyover Globe Life Park during opening day ceremonies before a baseball game between the Texas Rangers and Philadelphia Phillies in Arlington, Texas, Monday, March 31, 2014. (Photo by Louis DeLuca/AP Photo/The Dallas Morning News)

Supporters of Hindu nationalist Narendra Modi, prime ministerial candidate for the main opposition Bharatiya Janata Party (BJP), chant slogans as they leave after attending a rally in Gurgaon on the outskirts of New Delhi April 3, 2014. India, the world's largest democracy, will hold its general election in nine stages staggered between April 7 and May 12. (Photo by Adnan Abidi/Reuters)

Hong Kong violist Andrew Ling holds a rare 1719 viola called the “Macdonald” by Antonio Stradivari during a preview at the Sotheby's auction house in Hong Kong, on April 4, 2014. The Stradivarius viola is expected to sell for more than $45 million in a private sale. The auction house says that price would be a record for a musical instrument sold privately or at auction. (Photo by Kin Cheung/Associated Press)

A Bolivarian National Police officer fires tear gas at anti-government protesters during clashes in Caracas, Venezuela, on April 1, 2014. Riot police prevented the protesters from reaching the assembly, where opposition lawmaker Maria Corina Machado was stripped of her parliamentary seat last week, after addressing the Organization of American States about the conditions of Venezuela. (Photo by Fernando Llano/Associated Press)

A robot of a German team, left, plays the ball besides a British team robot in the Kids League at the RoboCup German Open 2014 in Magdeburg, Germany, Thursday, April 3, 2014. 44 international RoboCup Major League teams from 12 countries demonstrate the state-of-the-art competitions in soccer, rescue and service robots. The RoboCup German Open takes place from April 3 to April 5, 2014. (Photo by Jens Meyer/AP Photo)

People walk along a cracked road in Iquique, northern Chile, on April 2, 2014 a day after a powerful 8.2-magnitude earthquake hit off Chile's Pacific coast. (Photo by Aldo Solimano/AFP Photo)

A South Korean marine aims his machine gun during the U.S.-South Korea joint landing exercises called Ssangyong, part of the Foal Eagle military exercises, in Pohang, South Korea, on March 31, 2014. (Photo by Ahn Young-joon/Associated Press)