Two visitors sitting and walking on the installation “Berlin Facade” by Argentine artist Leandro Erlich take pictures of the exhibition “OM-D: Photography Playground” in Berlin on April 9, 2014. The interactive exhibition was designed by nine international artists and invites visitors to take pictures of themselves while visually experimenting with the art works. (Photo by Ronny Hartmann/AFP Photo)

Demonstrators take part in a protest against Venenzuelan President Nicolas Maduro in Caracas on April 6, 2014. The Government of Venezuelan President Nicolas Maduro on Sunday rejected the statements of Spanish Foreign Minister Jose Manuel Garcia-Margallo, who said that “the climate of reconciliation has been broken” in Venezuela as the wave of opposition protests continues in the South American country. (Photo by Carlos Becerra/AFP Photo)

A model presents a creation by Patricia Viera during the Fashion Rio 2015 Summer collection, in Rio de Janeiro, Brazil, on April 8, 2014. (Photo by Yasuyoshi Chiba/AFP Photo)

Britain's Catherine, Duchess of Cambridge looks at a static WWI display, with her husband Prince William (unseen), at the Omaka Aviation Heritage Centre near Blenheim, in New Zealand April 10, 2014. The Prince and his wife Kate are undertaking a 19-day official visit to New Zealand and Australia with their son George. (Photo by Anthony Devlin/Reuters)

South Korean workers sweep the bronze statue of King Sejong, the 15th-century Korean King, during a street and park spring cleanup event at Gwanghwamun plaza in Seoul on April 10, 2014. (Photo by Jung Yeon-Je/AFP Photo)

A Muslim girl, who is protected by local Christians, sits outside a house in the town of Gaga April 6, 2014. (Photo by Goran Tomasevic/Reuters)

Odilon Zaleta of Mexico, right, hits a right to Akira Yaegashi of Japan during their WBC flyweight title bout in Tokyo, April 6, 2014. (Photo by Shizuo Kambayashi/AP Photo)

French acrobat Denis Josselin balances on a tightrope as he crosses the Seine river in front of the Austerlitz bridge in Paris, April 6, 2014. (Photo by Christian Hartmann/Reuters)

Pro-Russian activists scuffle with police near the regional government building in Donetsk April 6, 2014. Around 100 pro-Russian protesters stormed the regional government building in the eastern Ukrainian city of Donetsk on Sunday and hung up a Russian flag in defiance of Kiev's pro-European government. (Photo by Mikhail Maslovsky/Reuters)

Filipino activists hold paper mache skulls painted with US flags as they march outside the US embassy in Manila, Philippines, April 7, 2014 in a rally condemning the upcoming visit of US President Barack Obama to the country. Activists also called for an end to the presence of US troops in the country and the Visiting Forces Agreement (VFA). Obama is set to visit Japan, South Korea, Malaysia and the Philippines in late April. The trip is part of his efforts to broaden US engagement in the Asia-Pacific region on all fronts, from strategic security issues to trade and diplomacy. (Photo by Dennis M. Sabangan/EPA)

A woman looks at bronze sculptures “Meercat 1” and “Meercat 2” by British artist Laura Ford at the “Art Cologne” art fair in Cologne April 9, 2014. The sculptures are on sale for 19,000 euros each. Some 200 international exhibitors are taking part in the 48th Art Cologne, one of the world's leading fairs for contemporary art. (Photo by Wolfgang Rattay/Reuters)

An Egyptian plainclothes policeman detains a student, who is a supporter of the Muslim Brotherhood and ousted President Mohamed Mursi, during a protest against the military and interior ministry in front of the faculty of Oral & Dental Medicine in Cairo University at Kasr El Aini street in downtown Cairo April 9, 2014. (Photo by Amr Abdallah Dalsh/Reuters)

A woman looks at the artwork “Marilyn Crucifix” depicting U.S. actress Marilyn Monroe by Dutch artist Saskia de Boer at the “Art Cologne” art fair in Cologne April 9, 2014. The sculpture is on sale for 9,200 euros. Some 200 international exhibitors are taking part in the 48th Art Cologne, one of the world's leading fairs for contemporary art. (Photo by Wolfgang Rattay/Reuters)

A customer drinks a bottle of water as his shoes are polished by a shoe shiner on a street in downtown Sao Paulo April 8, 2014. (Photo by Nacho Doce/Reuters)

Indian voters wait to cast their votes at a polling station during the first phase of the Indian general election in Lakhimpur district, Assam state, India, April 7, 2014. Voters in India's remote north-eastern states of Assam and Tripura were casting their ballots in the first phase of the country's general elections. Polls were taking place in five of Assam's 14 constituencies and one of two constituencies in Tripura, in the first of nine phases of voting. (Photo by EPA)

Nepal newly appointed “Living goddess” Unikia Bajracharya known as Kumari, poses for the photographer at her home before she attends traditional rituals with priests in Patan, Nepal, 09 April 2014. Seven-year-old Unika was chosen to become the new Kumari of Patan after the previous Kumari, Samita Bajrachary, aged 12, reached the puberty, which means that she is considered ritually unclean. (Photo by Narendra Shrestha/EPA)

An architectural model shows Phase Three of the development of Battersea Power Station on April 10, 2014 in London, England. The Power Station Development Company has unveiled the plans designed by architects Gehry Partners and Foster + Partners. This part of the regeneration of the Battersea site will feature a new high street to be called The Electric Boulevard. This will be the main gateway to the Battersea development, connecting the Northern Line Extension station with the 42-acre site comprised of over 1,300 homes, a 160 room hotel and 350,000 sq ft. of retail and restaurant space. (Photo by Peter Macdiarmid/Getty Images)

A child of the Syrian community in Romania with his face painted in the colors of Syria's flag, attends a demonstration in support of Syrian President Bashar Assad's regime, in Bucharest, Romania, Wednesday, April 9, 2014. Hundreds of Syrians joined by clerics of the Armenian church in Romania, gathered to protest against Turkey's support for the rebel groups in Syria and shouted slogans against Turkish Premier Erdogan. (Photo by Vadim Ghirda/AP Photo)

Squatters take cover from stun grenades and tear gas during an eviction in Rio de Janeiro, Brazil, Thursday, April 10, 2014. Squatters in Rio de Janeiro are clashing with police after a Brazilian court ordered that 5,000 people be evicted from abandoned buildings of a telecommunications company. Officers have used tear gas and stun grenades to try to disperse the families. (Photo by Silvia Izquierdo/AP Photo)

A supporter wearing a mask of Hindu nationalist Narendra Modi, prime ministerial candidate for India's main opposition Bharatiya Janata Party (BJP), cheers as Modi arrives to file nomination papers for the general elections in Vadodara in the western Indian state of Gujarat April 9, 2014. Criss-crossing the country for months before the first phase of voting began on Monday, the BJP and its candidate for prime minister, Modi, had mainly campaigned on a ticket of better governance, economic development and job creation. (Photo by Amit Dave/Reuters)

Massive flames engulf a tractor-trailer and a tour bus just after they collide on Interstate 5, Thursday April, 10, 2014, near Orland, Calif. At least 10 people were killed in the crash, authorities said. (Photo by Jeremy Lockett/AP Photo)

People take a tour in an “upside down home” in St. Petersburg April 10, 2014. The exhibition charges less than $10 for a walk through its three rooms and two bathrooms through the apartment. (Photo by Alexander Demianchuk/Reuters)

In this Sunday April 6, 2014 photo, tourists visit rapeseed field to see the blossoms in spring at Qianduo rapeseed field in Taizhou city, in eastern China's Jiangsu province. (Photo by AP Photo)

Members of the Cryophil winter swimmers club sunbathes as they sit on an ice floe on the Yenisei River in Krasnoyarsk, Russia, on April 9, 2014. (Photo by Ilya Naymushin/Reuters)

The “Escape Velocity” moving sculpture by artist group Poetic Kinetics looms over Coachella festivalgoers on the Empire Polo Field, on the first day of the 2014 Coachella Music and Arts Festival in Indio, California, on April 11, 2014. (Photo by Chris Pizzello/Invision)

Somali traders attempt to evacuate their goods from their shops near a burning petrol station in Hodan district of Somalia's capital Mogadishu, April 10, 2014. (Photo by Feisal Omar/Reuters)

Communist lawmakers scuffle with right-wing Svoboda ( Freedom) Party lawmakers during a parliament session of Verkhovna Rada, the Ukrainian parliament, in Kiev, Ukraine Tuesday, April 8, 2014. (Photo by Vladimir Strumkovsky/AP Photo)

Indian army recruits take part in their passing out parade at a garrison in Rangreth on the outskirts of Srinagar April 5, 2014. Authorities said that 311 young Kashmiri men of various religious backgrounds were formally inducted into the Indian army's Jammu and Kashmiri Light Infantry Regiment (JKLIR) after their 49 weeks of training. (Photo by Danish Ismail/Reuters)

Venezuelans protest against the government of Nicolas Maduro in Caracas, on April 10, 2014. (Photo by Miguel Gutierrez/EFE/SIPA Press)

An Indian artist dressed as the Hindu goddess Kali participates in a procession to celebrate the Ram Navami festival in Allahabad on April 8, 2014. Hindu devotees celebrate the festival of Ram Navami, the birth anniversary of Lord Rama, across India, which also marks the end of the nine-day long fasting and Navaratri festival. (Photo by Sanjay Kanojia/AFP Photo)