A woman walks past a burning shop in the Maskuf market in the Old City of Homs, some 162 kilometres north of the capital Damascus, on May 12, 2014. Syrians streamed back into the ruins of the Old City of Homs on May 10, picking through the remains of their homes and trying to come to terms with the destruction after rebel forces in the Old City were besieged for nearly two years before the deal to evacuate, and regime troops shelled the area almost daily throughout. The influx came a day after the last rebel holdouts left the area under an evacuation deal that handed the Old City back to the government, granting it a symbolic victory. (Photo by Joseph Eid/AFP Photo)

Female members of the Palestinian presidential guard take part in a training session given by French GIGN gendarme in the West Bank city of Jericho on May 12, 2014. (Photo by Thomas Coex/AFP Photo)

A woman passes by a sculpture by Marc Quinn titled “Myth Venus” before the start of the afternoon session auction May 14, 2014 at Christie's Morning & Afternoon Session of Post-War and Contemporary Art in New York. (Photo by Timothy A. Clary/AFP Photo)

Turkish riot police use water cannon to disperse protesters as they clash during a demonstration for the victims of the Soma mine explosion, in Istanbul, Turkey, 14 May 2014. Turkey declared three days of mourning on 14 May as the death toll from the country's worst mining disaster in more than two decades reached 205, with fears that the number could climb much higher. Of the 787 workers who were in the coal mine when the explosion and fire occurred late 13 May, only 363 of them have been accounted for, including those killed. (Photo by Sedat Suna/EPA)

A car (bottom) drives down a flooded street amid heavy rainfall in Shenzhen, Guangdong province May 11, 2014. The worst rainstorm since 2008 hit Shenzhen on Sunday, where the authorities issued a red alert for the heavy downpour, state television reported. (Photo by Reuters)

Proteters clash with Turkish police in Ankara on May 14, 2014 during a demonstration gathering hundreds after more than 200 people were killed in an explosion at a mine. Police fired tear gas and water cannon when around 800 protesters shouting slogans against the government faced police intervention attempted to march from the Middle East Technical University to the energy ministry. (Photo by Adem Altan/AFP Photo)

A man looks up as a stuffed toy of Malaysia Airlines MH370 is on sale at a store in Guangzhou, Guangdong province, May 11, 2014. (Photo by Alex Lee/Reuters)

Two men stand in the waters in front of their flooded house as they wait to be evacuated in the town of Obrenovac, east from Belgrade May 16, 2014. The heaviest rains and floods in 120 years have hit Bosnia and Serbia, killing five people, forcing hundreds out of their homes and cutting off entire towns. (Photo by Marko Djurica/Reuters)

Venezuela's national guards detain an anti-government protester during a protest against President Nicolas Maduro's government in Caracas May 12, 2014. (Photo by Carlos Garcia/Reuters)

Former Tunisian Femen activist Amina Sboui (R) gestures along with another bare-chested woman, shouting slogans for the freedom of Raef Badawi, in front of the Saudi embassy in Paris on May 12, 2014. A Saudi court sentenced Raef Badawi, the founder of a human rights group, to 10 years in jail and 1,000 lashes on May 7, 2014 over “insulting Islam”, an activist said. (Photo by Thomas Samson/AFP Photo)

Sister Maricor, from the Missionaries of Charity, spends a moment with one-year-old John, who has hydrocephalus, at an orphanage in Old Dhaka May 11, 2014. (Photo by Andrew Biraj/Reuters)

A Pakistani labourer carries a sack of wheat to build a pyramid of wheat sacks used to store wheat supplies near Multan in South Punjab province May 12, 2014. (Photo by Zohra Bensemra/Reuters)

Russia's Sergei Kalinin (L) and Sergei Shirokov (R) scuffle with Craig Smith (15) and Tyler Johnson (9) of the U.S. during the second period of their men's ice hockey World Championship group B game at Minsk Arena in Minsk May 12, 2014. (Photo by Alexander Demianchuk/Reuters)

A child walks near the life-size characters figures of the Star Wars movies on display at a shopping mall in Beijing, China Sunday, May 11, 2014. (Photo by Andy Wong/AP Photo)

A Palestinian protester argues with members of Palestinian security forces loyal to Hamas during a protest marking the 66th anniversary of Nakba, near the border of east Gaza City with Israel May 15, 2014. Palestinians marked “Nakba” (Catastrophe) on Thursday to commemorate the expulsion or fleeing of some 700,000 Palestinians from their homes in the war that led to the founding of Israel in 1948. (Photo by Mohammed Salem/Reuters)

A woman looks at the oil on canvas painting “Betty” from 1988 by German artist Gerhard Richter during a media preview of the exhibition “Gerhard Richter” at the Fondation Beyeler in Riehen near Basel May 16, 2014. The exhibition will be open to the public from May 18 to September 7. (Photo by Arnd Wiegmann/Reuters)

Young residents play soccer at the Sao Carlos slum in Rio de Janeiro, Brazil, Monday, May 12, 2014. As opening day for the World Cup approaches, people continue to stage protests, some about the billions of dollars spent on the World Cup at a time of social hardship, but soccer is still a unifying force. The international soccer tournament will be the first in the South American nation since 1950. (Photo by Felipe Dana/AP Photo)

Jamie Herrel (C) of Cebu city, central Philippines, holds onto her crown as she is congratulated by other candidates after being crowned as Miss Philippines-Earth 2014 on coronation night in Manila May 11, 2014. Herrel, competed against 49 other candidates for the top post of Miss Philippines-Earth and will represent the country in the coming 2014 Miss Earth beauty pageant which advocates in preserving the environment, local media reported. (Photo by Romeo Ranoco/Reuters)

A miner cries as rescue workers carry the dead body of a miner from the mine in Soma, western Turkey, Wednesday, May 14, 2014. An explosion and fire at the coal mine killed at least 232 workers, authorities said, in one of the worst mining disasters in Turkish history. Turkey's Energy Minister Taner Yildiz said 787 people were inside the coal mine at the time of the accident. (Photo by Emrah Gurel/AP Photo)

A woman holds burning incense as she prays for good fortune at the Yonghegong Lama Temple in Beijing May 12, 2014. The temple which was built in 1694 is the biggest Tibetan Buddhist lamasery in Beijing. (Photo by Kim Kyung-Hoon/Reuters)

Female soldiers, as members of honour guards for the first time, stand in a line during a welcoming ceremony for Turkmenistan's President Gurbanguly Berdimuhamedov outside the Great Hall of the People, in Beijing, May 12, 2014. (Photo by Jason Lee/Reuters)

A man poses for photographs on a full-scale replica of the Sphinx, that is part of an unfinished theme park that will also accommodate the production of movies, television shows and animation, on the outskirts of Shijiazhuang, Hebei province May 10, 2014. The replica is a venue of a film studio which is already functioning. The theme park is scheduled to open this October, local media reported. (Photo by Reuters/Stringer)

The head of a full-scale replica of the Sphinx, which is part of an unfinished theme park that will also accommodate the production of movies, television shows and animation, is seen behind trees on the outskirts of Shijiazhuang, Hebei province May 15, 2014. (Photo by Petar Kujundzic/Reuters)

Smoke rises after what activists said were barrel bombs dropped by forces loyal to Syria's President Bashar al-Assad at Jabal al-Turkman in Latakia province May 11, 2014. (Photo by Reuters/Stringer)

Chinese dancers perform for the opening ceremony of the International Akhal-Teke Horses Association Special Conference and China Horse Culture Festival in Beijing, on May 12, 2014. (Photo by Jason Lee/Reuters)

Iraqi security forces search for weapons during clashes with al Qaeda-linked Islamic State of Iraq and the Levant (ISIL) in the city of Ramadi, May 12, 2014. Iraqi forces are locked in a four-month fight with al Qaeda offshoot the Islamic State of Iraq and the Levant (ISIL) for the cities of Ramadi and Fallujah. (Photo by Reuters/Stringer)

Traditional Russian Matryoshka wooden dolls depicting (L-R) Japanese astronaut Koichi Wakata, Russian cosmonaut Mikhail Tyurin and U.S. astronaut Rick Mastracchio, stand on a table during a welcoming ceremony at the airport in Karaganda, Kazakhstan, May 14, 2014. A Soyuz space capsule with Japanese astronaut Koichi Wakata, Russian cosmonaut Mikhail Tyurin and U.S. astronaut Rick Mastracchio, returning from a five-month mission to the International Space Station, landed safely Wednesday on the steppes of Kazakhstan. (Photo by Dmitry Lovetsky/Reuters)

An Armatix employee holds a “smart gun” by the company at the Armatix headquarters in Munich May 14, 2014. The gun is implanted with an electronic chip that allows it to be fired only if the shooter is wearing a watch that communicates with it through a radio signal. If the gun is moved more than 10 inches (25 cm) from the watch, it will not fire. A Maryland gun shop owner has dropped his plan to be the first in the United States to sell the so-called “smart gun” after a backlash that included death threats. (Photo by Michael Dalder/Reuters)

North Korean leader Kim Jong Un inspects the Korean People's Army (KPA) Air and Anti-Air Force Unit 447, which has been honoured with the title of O Jung Hup-led 7th Regiment, in this undated photo released by North Korea's Korean Central News Agency (KCNA) in Pyongyang on May 14, 2014. (Photo by Reuters/KCNA)

National guards fire pellets at anti-government protesters during a protest against Venezuelan President Nicolas Maduro's government in Caracas May 14, 2014. Venezuela's opposition warned that talks with Maduro's government are “in crisis” due to repression of student demonstrations and officials' refusal to grant concessions that could defuse three months of street protests. Ramon Guillermo Aveledo, head of the opposition umbrella group MUD, said Socialist Party leaders have undermined the dialogue with constant insults and a refusal to consider amnesty for opposition-linked prisoners. (Photo by Carlos Garcia Rawlins/Reuters)

Debris rises during what rebel fighters said was an operation in which they blew up a tunnel targeting the regime's al-Sawadi checkpoint, in Idlib province May 14, 2014. This checkpoint was considered one of the regime's biggest and most important checkpoints, and was used to protect the east side of Wadi al-Deif military camp. (Photo by Khalil Ashawi/Reuters)

Riot police run away from the flames of a fire bomb thrown by protesters as they demonstrate to blame the ruling AK Party (AKP) government on the mining disaster in western Turkey, in Ankara May 14, 2014. Rescuers pulled more dead and injured from a coal mine in western Turkey on Wednesday more than 19 hours after an explosion, bringing the death toll to above 200 in what could become the nation's worst ever mining disaster.Hundreds more were still believed to be trapped in the mine in Soma, about 480 kilometres (298 miles) southwest of Istanbul. The explosion, which triggered a fire, occurred shortly after 3 pm (1200 GMT) on Tuesday. (Photo by Reuters)