A view of the USS George Washington aircraft carrier (CVN-73) in Busan, South Korea, 11 July 2014. USS George Washington arrived in South Korea on 11 July as part of a planned visit.

Jeon Heon-Kyun/EPA

A view of the USS George Washington aircraft carrier in Busan, South Korea. It arrived there on Friday as part of a planned visit.

Ukrainian government soldiers sit on an armoured vehicle as they take up a position in a sunflower field around 20 Km south of Donetsk on July 10, 2014. Ukrainian forces have massed tanks and armoured vehicles around 20 kilometres (12 miles) south of the rebel-held city of Donetsk. A column of vehicles stretching a kilometre and a half (one mile) arrived on Wednesday without facing any resistance, Ukrainian soldiers said, as part of a campaign to surround Donetsk and the neighbouring city of Lugansk, also controlled by pro-Russian separatists.

Dominique Faget/AFP

Ukrainian government soldiers sit on an armoured vehicle as they take up a position in a sunflower field about 20 km south of Donetsk. Ukrainia forces have massed tanks and armoured vehicles about 20 km south of the rebel-held city of Donetsk

A woman from Brazil and a man from Argentina dance samba at the World Cup Fan Fest 2014, on Copacabana beach, in Rio de Janeiro, Brazil, Wednesday, July 9, 2014. The flood of foreign football fans, the vast majority of them men, has been a boon for the single ladies of Brazil, where a demographic imbalance means women outnumber men by more than 4 million nationally.

Silvia Izquierdo/AP

A Brazilian woman and an Argentinian man samba at Fifa Fan Fest 2014 on Copacabana beach in Rio de Janeiro, Brazil. Argentina reached the World Cup final after beating Holland, while Brazil failed to make it through after losing to Germany

A Chinese woman adjusts the Chinese national flag near U.S. national flags before a Strategic Dialogue expanded meeting that's part of the U.S.-China Strategic and Economic Dialogue at the Diaoyutai State Guesthouse in Beijing, Thursday, July 10, 2014.

Ng Han Guan/AP

The US and Chinese national flags are prepared ahead of a meeting that forms part of the US-China Strategic and Economic Dialogue at Diaoyutai State Guesthouse in Beijing on Thursday.

A highland cow is prepared for judging at the Great Yorkshire Show, Harrogate, North Yorkshire. PRESS ASSOCIATION Photo. Picture date: Wednesday July 9, 2014.

Anna Gowthorpe/PA

A highland cow is prepared for judging at the Great Yorkshire Show, Harrogate, North Yorkshire

A boy plays with a ball at a temporary tent camp set up for Ukrainian refugees in the town of Novoshakhtinsk in Rostov region near the Russian-Ukrainian border, southern Russia, July 9, 2014.

Sergei Karpukhin/Reuters

A boy plays with a ball at a temporary tent camp set up for Ukrainian refugees in the town of Novoshakhtinsk in Rostov near the Russian-Ukrainian border, southern Russia

Palestinian relatives mourn during the funeral of members of Hamad family in the town of Beit Hanoun in the northern Gaza Strip July 9, 2014. Militants in Gaza fired more rockets at Tel Aviv on Wednesday, targeting Israel's heartland after Israeli attacks in the enclave that Palestinian officials said have killed at least 27 people. Israel assassinated a senior local leader of the Islamic Jihad militant group in the northern Gaza Strip early on Wednesday, neighbours and hospital officials said, and five others including family members were killed. An Israeli military spokeswoman said she had no initial details on the strike.The militant, Hafez Hamad, two brothers and his parents were killed when his house was bombed in an air strike in the town of Beit Hanoun in the northern Gaza Strip, Hamas media and Gaza interior ministry said. An unidentified woman in the house was also killed.

Mohammed Salem/Reuters

Palestinian relatives mourn at the funeral of members of the Hamad family in the town of Beit Hanoun in the northern Gaza Strip

Shiite volunteers from the Iraqi Ketaeb (brigade) Hezbollah, march as they join the Iraqi army to fight against Jihadist militants of the Islamic State (IS), formerly known as the Islamic State in Iraq and the Levant (ISIL), on July 9, 2014, in Baghdad.. Iraq's government once battled entrenched Shiite militiamen but is now making common cause with them against a jihadist-led onslaught that Baghdad's forces are struggling to contain on their own.

Ahmad Al-Rubaye/AFP

Shia volunteers from the Iraqi Ketaeb (brigade) Hezbollah, march as they join the Iraq army to fight against Jihadist militants of the Islamic State, formerly known as the Islamic State in Iraq and the Levant (Isis), on Wednesday, in Baghdad

People holding umbrellas walk against strong winds and heavy rain brought about by Typhoon Neoguri on a street in Naha, on Japan's southern island of Okinawa, in this photo taken by Kyodo July 9, 2014. Torrential rains battered Japan's Okinawa islands on Wednesday as a weakened but still dangerous typhoon, leaving two dead and threatening widespread flooding as it headed for the nation's main islands.  Mandatory credit.

Kyodo/Reuters

People struggle against strong winds and heavy rain brought about by Typhoon Neoguri on a street in Naha, on Japan’s southern island of Okinawa on Wednesday

A girl cries as she is being hit with a sponge by a Cara Vinagre (Vinegar Face), one of the traditional characters called Kilikis, at the San Fermin festival in Pamplona July 8, 2014.

Eloy Alonso/Reuters

A girl cries as she is being hit with a sponge by a Cara Vinagre (Vinegar Face), one of the traditional characters called Kilikis, at the San Fermin festival in Pamplona