Graffiti decorates the wall of an old house in the Tunisian island of Djerba on July 29, 2014. More than 100 artists from 40 countries were invited by France-based Tunisian artist Mehdi Ben Cheikh to take part in an initiative to turn Djerba's Erriadh district into an “open sky museum”. (Photo by F. Nasri/AFP Photo)

A boy sits near a car stuck under a roof, which collapsed after heavy rains and floods hit the town of Ittre July 30, 2014. (Photo by Francois Lenoir/Reuters)

Georgina Hockenhull of Wales performs on the beam during the women's gymnastics apparatus final at the 2014 Commonwealth Games in Glasgow, Scotland, August 1, 2014. (Photo by Phil Noble/Reuters)

A man looks at a car that is partially submerged in floodwaters in Novaci, southwest Romania, July 30, 2014. Hundreds of people were evacuated from floods in southern Romania, local authorities reported. (Photo by Bogdan Cristel/Reuters)

Two motorbike drivers take a nap at a street in Hanoi, Vietnam 30 July 2014. Vietnam's inflation rate increased 1.62 percent in the first seven months of 2014, according to data from the General Statistics Office (GSO). This is considered as the lowest rate in the last 13 years in Vietnam. (Photo by Luong Thai Linh/EPA)

Caitlin Jenkins, 17, (L) and Natascha Newbold, 17, (R) ride the StarFlyer on London's South Bank on July 29, 2014 in London, England. London is currently experiencing a period of warm weather forecasted to continue the rest of this week. (Photo by Dan Kitwood/Getty Images)

Festival-goers kiss as they arrive to the campsite of the 20th Przystanek Woodstock (Woodstock Bus Stop) in Kostrzyn on the Odra River, Poland, July 29, 2014. The open air event with free entrance will run from 31 July to 02 August. (Photo by Lech Muszynski/EPA)

A handout photo made available by the Italian CoastGuards of an aerial view as the Costa Concordia undertakes one of her docking manoures in the harbour of Genoa, July 29, 2014. She will gradually move to her final resting place before being reduced to scrap. (Photo by EPA/Italian Coastguards)

Residents help an injured man who survived what activists said were two barrel bombs dropped at a site by forces loyal to Syria's President Bashar al-Assad in Al-Shaar neighbourhood of Aleppo July 27, 2014. (Photo by Reuters)

Valerie Trierweiler, former companion of French President Francois Hollande and head of the Association “Bring Back Our Girls”, displays her T-shirt reading “Bring Back Our Girls, Secure the paths to School”, during the inauguration of a creation, symbolizing the hundreds of girls abducted from the Government Secondary School in Chibok, Nigeria, at Place de la Republique in Paris, France, Monday, July 28, 2014. Islamic extremists were responsible for the kidnapping. (Photo by Francois Mori/AP Photo)

A man works in a giant dragon-fly structure of flowers, during the Flower Festival in Medellin, Antioquia department, Colombia on July 31, 2014. (Photo by Raul Arboleda/AFP Photo)

A live fire drill is held by the South Korean artillery unit at the border with North Korea in Yeoncheon County, Gyeonggi Province, South Korea, 30 July 2014. (Photo by EPA/Yonhap)

An armored police vehicle clearing the blocked street in front of a house occupied by squatters being evicted by police in Vienna, Austria, July 28, 2014. The house in the Leopoldstadt neighborhood, has been occupied for the past two and a half years. (Photo by Herbert Oczeret/EPA)

Actress Nicola Peltz poses for photographers during Japan premiere of Transformers: Age of Extinction in Tokyo Monday, July 28, 2014. (Photo by Shizuo Kambayashi/AP Photo)

Race leader Astana team rider Vincenzo Nibali of Italy cycles during the 54-km individual time trial 20th stage of the Tour de France cycling race from Bergerac to Perigueux July 26, 2014. (Photo by Christian Hartmann/Reuters)

Somali boys play with their toy guns after attending Eid al-Fitr prayers to mark the end of the fasting month of Ramadan in Somalia's capital Mogadishu, July 28, 2014. (Photo by Feisal Omar/Reuters)

A “sunken” house is seen in the pond of the Kunsthalle Rostock museum in Rostock, Germany, August 1, 2014. The installation “Atlantis” by Finnish artist Tea Maekkipaeae has been set up in the pond on July 31. It is part of the exhibiton “Nature and More” with contemporary artists from Finnland which will run until September 14, 2014. (Photo by Bernd Wuestneck/EPA)

Zoe Smith of England celebrates after winning the gold medal in the women's 58kg weightlifting competition at the 2014 Commonwealth Games in Glasgow, Scotland, July 26, 2014. (Photo by Phil Noble/Reuters)

A young Alphorn blower carries his Alphorn before performing an ensemble piece on the last day of the International Alphorn Festival on Lac de Tracouet near the village of Nendaz, July 27, 2014. About 150 alphorn blowers took part in the contest this year. (Photo by Pierre Albouy/Reuters)

A boy watches a remote-controlled camera fly above (unseen) during a prayer session on Eid al-Fitr at Sunda Kelapa port in Jakarta July 28, 2014. Indonesia, which has the world's largest Muslim population, celebrates Eid al-Fitr with mass prayers and family visits to mark the end of the Muslim holy fasting month of Ramadan. (Photo by Darren Whiteside/Reuters)

Spanish rider Dani Torres performs a jump during the Burn Freestyle Malaga motocross show at the Malagueta bullring in Malaga, southern Spain, early July 27, 2014. (Photo by Jon Nazca/Reuters)

Marie-Julie Malboeuf of Canada lifts during the women's 58kg weightlifting competition at the 2014 Commonwealth Games in Glasgow, Scotland, July 26, 2014. (Photo by Phil Noble/Reuters)

Participants take part in The Sumo Run in Battersea Park, London July 27, 2014. The runners, wearing inflatable costumes, take part in the 5km run with the aim of raising money for a charity to help educate children in Africa. (Photo by Neil Hall/Reuters)

Pirelli hostesses take pictures as drivers compete during the Hungarian F1 Grand Prix at the Hungaroring circuit, near Budapest July 27, 2014. (Photo by David W. Cerny/Reuters)

Kenya's Denis Okoth lands a punch on England's Samuel Maxwell during their men's Light Welterweight boxing fight at the Commonwealth Games in Glasgow, Scotland, July 27, 2014. (Photo by Jim Young/Reuters)

The anthropomorphic robot named hitchBOT sits on the shoulder of Highway 102 to begin its 6000 kilometer cross country journey outside of Halifax, Nova Scotia, July 27, 2014. The hitch hiking robot is part of a social experiment to see if drivers will pick up and drop off the robot in one piece to an art gallery in Victoria, British Columbia. (Photo by Paul Darrow/Reuters)

An giant inflatable figure in the shape of a pink river dolphin floats offshore of the Ponta Negra beach along the Amazon river in Manaus July 27, 2014. The figure was placed by organizers of the Red Alert conservation campaign which is trying to halt the killing of the dolphin, which is illegal but common. (Photo by Bruno Kelly/Reuters)

Photographers take pictures as models in bikinis wash a car during a promotional event at an auto service centre in Taiyuan, Shanxi province July 27, 2014. According to local media, the owner of the service centre hired two models to wash a car in bikinis and invited customers to take pictures as part of a promotional campaign, hoping to attract more business. (Photo by Reuters/Stringer)

Adam Barrett of England is seen underwater as he swims in the men's 100m Butterfly final during the 2014 Commonwealth Games in Glasgow, Scotland, July 28, 2014. (Photo by Stefan Wermuth/Reuters)

An ancient tower is seen balancing on the top of a dirt hill, with its base slightly eroded, along a grassland in Qixian county, Shanxi province July 19, 2014. Local authorities said they were looking into way to protect and remedy the tower after pictures, taken by a relic preservation enthusiast, were posted on the Internet, local media reported. (Photo by Reuters/Stringer)

Afghanistan's president honor guard offer Eid al-Fitr prayer at the presidential palace in Kabul, Afghanistan, July 28, 2014. Afghan Muslims began to celebrate the three day festival of Eid-al-Fitr, which marks the end of the holy fasting month of Ramadan. (Photo by Hedayatullah Amid/EPA)