An injured pro-Russian armed man is helped out of a car by a medical staff member at a hospital in the town of Slaviansk, eastern Ukraine, in this May 5, 2014 file photo. (Photo by Baz Ratner/Reuters)

U.S. Secretary of State John Kerry kicks a soccer ball around during an airplane refuelling stop on Sal Island in Cape Verde, enroute to Washington DC, in this May 5, 2014 file photo. (Photo by Saul Loeb/Reuters)

Scottish country dancer Mairie McGillivray, 16, dances on the beach at Bridgend as she poses for a photograph on the Hebridean island of Islay, in this March 11, 2014 file photo. (Photo by Paul Hackett/Reuters)

A general view shows the Israeli air force museum in Beersheba, as seen from an Israeli Air Force plane during an aerial show as part of celebrations for Israel's Independence Day to mark the 66th anniversary of the creation of the state, in this May 6, 2014 file photo. (Photo by Amir Cohen/Reuters)

Singer Bob Geldof attends a media launch of the Africa Progress Report 2014 in London, in this May 8, 2014 file photo. (Photo by Stefan Wermuth/Reuters)

U.S. singer Miley Cyrus performs at the O2 Arena in central London, in this May 6, 2014 file photo. (Photo by Olivia Harris/Reuters)

Former Italian prime minister Silvio Berlusconi looks on as he arrives at the Sacred Family Foundation, where he will serve part of his one-year tax fraud sentence by doing community service with the elderly, in Cesano Boscone, a small town on the outskirts of Milan, in this May 9, 2014 file photo. (Photo by Stefano Rellandini/Reuters)

Forces loyal to Syria's President Bashar al-Assad play football in the al-Hamdeya neighbourhood of Homs city, in this May 9, 2014 file photo. (Photo by Khaled al-Hariri/Reuters)

A voter is seen inside a voting booth at a polling station during the referendum on the status of the Donetsk region in the eastern Ukrainian city of Donetsk, in this May 11, 2014 file photo. (Photo by Konstantin Chernichkin/Reuters)

A woman cries after her partner was detained and taken away by Ukrainian security forces for being aggressive at an army checkpoint during a referendum on self-rule in the southeastern port city of Mariupol, in this May 11, 2014 file photo. (Photo by Marko Djurica/Reuters)

Children play soccer during a training session at Sao Carlos slum in Rio de Janeiro, in this May 15, 2014 file photo. (Photo by Pilar Olivares/Reuters)

A civil police officer (foreground, L) detains young suspects after a store was looted during a police strike in Recife, in this May 15, 2014 file photo. (Photo by Igo Bione/Reuters/JC Imagem)

Yekaterina Len, 61, cries outside her destroyed house following what locals say was overnight shelling by Ukrainian forces in the outskirts of the eastern Ukrainian town of Slaviansk, in this May 20, 2014 file photo. (Photo by Yannis Behrakis/Reuters)

Anti-government protest leader Suthep Thaugsuban gives a traditional greeting to the media before leaving Government House in Bangkok, in this May 20, 2014 file photo. (Photo by Chaiwat Subprasom/Reuters)

Moleque Travesso soccer club's goalkeeper Alexandre Toledo, 36, prepares to block a shot during an amateur match against the Jardim Regina Pirituba club at Pirituba soccer field in Sao Paulo, in this March 29, 2014 file photo. (Photo by Nacho Doce/Reuters)

A riot policeman uses a baton to hit a rioting University of Nairobi student in Kenya's capital Nairobi, in this May 20, 2014 file photo. (Photo by Noor Khamis/Reuters)

Afghan President Hamid Karzai (R) walks away after shaking hands with his Chinese counterpart Xi Jinping before the opening ceremony of the fourth Conference on Interaction and Confidence Building Measures in Asia (CICA) summit at the Expo Centre in Shanghai, in this May 21, 2014 file photo. (Photo by Aly Song/Reuters)

Workers peel newspaper off a wall after repainting the hammer and sickle symbol of the Chinese Communist Party flag on it at the Nanhu Revolutionary Memorial museum in Jiaxing, Zhejiang province, in this May 21, 2014 file photo. (Photo by Chance Chan/Reuters)

Nigerian teenager Deborah Peters, the sole survivor of a Boko Haram attack on her family in 2011, speaks to reporters on Capitol Hill in Washington, in this May 21, 2014 file photo. (Photo by Kevin Lamarque/Reuters)

Members of a vigilante group of traditional hunters pose for a picture at their camp in Maiduguri, in this May 21, 2014 file photo. (Photo by Joe Penney/Reuters)

Protesters carry a man who was shot by French soldiers after French troops opened fire at protesters blocking a road in Bambari, in this May 22, 2014 file photo. (Photo by Goran Tomasevic/Reuters)

Pope Francis touches the wall that divides Israel from the West Bank, on his way to celebrate a mass in Manger Square next to the Church of the Nativity in the West Bank city of Bethlehem, in this May 25, 2014 file photo. (Photo by Mheisen Amareen/Reuters)

Thai Army chief General Prayuth Chan-ocha pauses as he addresses reporters at the Royal Thai Army Headquarters in Bangkok, in this May 26, 2014 file photo. (Photo by Damir Sagolj/Reuters)

Men watch the 2014 World Cup Group B soccer match between the Netherlands and Australia on a laptop, at a camel market in Daba near Tabuk, in this June 18, 2014 file photo. (Photo by Mohamed Alhwaity/Reuters)

A giant statue of U.S. actress Marilyn Monroe is seen at the dump site of a garbage collecting company in Guigang, Guangxi Zhuang Autonomous Region, in this June 18, 2014 file photo. (Photo by Reuters/China Daily)