A vendor eats by the side of a street while holding on to balloons at a shopping district in Beijing July 17, 2014. (Photo by Kim Kyung-Hoon/Reuters)

An Indian street performer Shanti, 8, walks a tightrope in Allahabad, India, Wednesday, July 16, 2014. Shanti and her two siblings perform on streets and earn about Rupees 12000-16000 (US$203-271) in a month. (Photo by Rajesh Kumar Singh/AP Photo)

Women pose for pictures in front of Universal Studios Japan's new attraction “The Wizarding World of Harry Potter” as it is opened to the public at Universal Studios Japan in Osaka, in this photo taken by Kyodo July 15, 2014. (Photo by Reuters/Kyodo)

Indian Jaintia tribesmen pull a chariot during celebrations for the Behdienkhlam festival in Jowai, some 64 kms from Shillong, on July 16, 2014. Behdienkhlam is a traditional festival celebrated after farmers plant their crops, seeking a good harvest. Prayers are also offered to drive away plague and other diseases. (Photo by Biju Boro/AFP Photo)

Laundry is hung on a traffic sign on a street in Beijing July 16, 2014. (Photo by Kim Kyung-Hoon/Reuters)

Central American immigrants get on the so-called La Bestia (The Beast) cargo train, in an attempt to reach the Mexico-US border, in Arriaga, Chiapas state, Mexico on July 16, 2014. (Photo by Elizabeth Ruiz/AFP Photo)

Central American immigrants get on the so-called La Bestia (The Beast) cargo train, in an attempt to reach the Mexico-US border, in Arriaga, Chiapas state, Mexico on July 16, 2014. (Photo by Elizabeth Ruiz/AFP Photo)

Afghan police run for cover at the site of a Taliban attack in front of Kabul's military airport on July 17, 2014. Explosions and gunfire rang out after the Taliban on July 17 attacked Kabul airport in the militants' latest brazen attempt to steal the initiative with the country in the grip of a presidential power struggle. (Photo by Shah Marai/AFP Photo)

A picture taken from the southern Israeli city of Sderot shows rockets being fired from the Gaza strip into Israel, on July 13, 2014. Israel sharpened its campaign against Gaza Sunday, warning Palestinians in the north to flee after marines mounted a ground attack, as diplomatic efforts to halt the bloodshed intensified. So far, no Israelis have been killed, although militants in Gaza have pounded the south and centre of the country with about 715 rockets since the fighting began on July 8 and army spokeswoman told AFP tonight. Around 160 had been intercepted, she said. Also, for the first time during the Israeli operation, a rocket fired from Syria hit the Israeli-occupied sector of the Golan heights but landed on empty ground, causing no casualties. (Photo by Jack Guez/AFP Photo)

A giant dead parrot measuring 15 metres is unveiled on London's South Bank to promote the live broadcast of the final Monty Python Live stage show on comedy TV channel Gold this Sunday 20 July, 2014. A team of three sculptors spent over two months creating the homage to the famous Norwegian Blue after the dead parrot was voted the nation's favourite Monty Python sketch in a survey by the channel. (Photo by David Parry/PA Wire)

A wax likeness of German Chancellor Angela Merkel is pictured in front of the Brandenburg Gate in Berlin on July 16, 2014, on the occassion of Merkel's 60th birthday on July 17. (Photo by Clemens Bilan/AFP Photo)

This picture taken on July 16, 2014 shows members of pantomime group Gabez clad in a samurai (R) and ninja (L) costums performing at Asakusa shrine in Tokyo during a press preview for the new bus tour to enjoy ninja acts on the street and the ancient shrine. Japan's travel agency JTB will start the new entertainment bus tour with ninja performance in Tokyo from next month. (Photo by Yoshikazu Tsuno/AFP Photo)

A girl watches well preserved skeleton of a mammoth (Mammutus columbi) who lived in america over a million years ago exhibited at the museum of the National Institute of Anthropology and History of Acapulco “Fuerte de San Diego”, on July 16, 2014 in Acapulco, Mexico. The fossilized bone structure of the mammoth was found in archaeological excavations carried out at the beginning of 1990 in the State of Mexico. (Photo by Pedro Pardo/AFP Photo)

A member of the Afghan intelligence force points his pistol towards the body of an insurgent following an attack by the Taliban at Kabul's airport on July 17, 2014. Explosions and gunfire rang out as the Taliban attacked Kabul airport in the militants' latest attempt to steal the initiative with the country in the grip of a presidential power struggle. (Photo by Shah Marai/AFP Photo)

People pose on July 14, 2014 while standing on the wreckage of a Ukrainian AN-26 military transport plane after it was shot down by a missile in the village of Davydo-Mykilske, east of Lougansk near the Russian border. According to villagers of Davydo-Mykilske, many of whom rushed to the crash site on motorcycles and bikes to see if they could collect parts from the wreckage, the plane came down at around 12:30 (9:30 GMT). Residents say that at least some of the crew were able to parachute from the plane before it crashed, but they did not know where they landed. (Photo by Dominique Faget/AFP Photo)

Switzerland's Geraldine Fasnacht jumps from the top of the Brevent mountain to fly in wingsuit over the French ski resort of Chamonix on July 16, 2014. (Photo by Philippe Desmazes/AFP Photo)

Switzerland's Geraldine Fasnacht jumps from the top of the Brevent mountain to fly in wingsuit over the French ski resort of Chamonix on July 16, 2014. (Photo by Philippe Desmazes/AFP Photo)

Visitors walk past sand sculptures displayed during the 13th International Festival of sand sculptures World of fairy tales in the Peter and Paul Fortress in St.Petersburg on July 17, 2014. (Photo by Olga Maltseva/AFP Photo)

Vegetarian 19-year-old model Courtney Stodden gets ready to serve veggie hot dogs wearing a lettuce bikini during a People for the Ethical Treatment of Animals (PETA) free veggie dog handout on Capitol Hill in Washington, DC, July 16, 2014. (Photo by Jim Watson/AFP Photo)

A nun holds an Argentinian national soccer team jersey as she waits for Pope Francis' Sunday Angelus prayer in Saint Peter's square at the Vatican, on Jule 13, 2014. (Photo by Tony Gentile/Reuters)

Instructor Kellie Crawford, right, pulls the digestive systems of a frog from the body cavity for camper Joy Andrews, 8, during the Blood and Guts summer camp class Wednesday, July 16, 2014, at Mobius Science Center in Spokane, Wash. At the two-day camp, kids learned about anatomy and got to dissect a cow eye and a frog at the end of the second day. As a group, the kids identified major organs and features of the frogs, then were given time to explore on their own. (Photo by Jesse Tinsley/AP Photo/The Spokesman-Review)

Participants play in a mud pool during the Boryeong Mud Festival at Daecheon Beach in Boryeong, South Korea, Friday, July 18, 2014. The 17th annual mud festival features mud wrestling and mud sliding. (Photo by Ahn Young-joon/AP Photo)

This aerial photo shows a large plume of smoke and steam rises from just south of Pateros, Wash., Friday morning, July 18, 2014 from the Carlton Complex Fire. Authorities say the wildfire has already burned about 100 homes and prompted the evacuation of Pateros, home to about 650 people in Okanogan County. A hospital in nearby Brewster was also evacuated as a precaution. (Photo by Don Seabrook/AP Photo/The Wenatchee World)

A Eurofighter Typhoon takes off for a flying display during Farnborough International Air Show, Farnborough, England, Monday, July 14, 2014. (Photo by Sang Tan/AP Photo)