North Korean girls in similar bathing suits stand under a shower at the Songdowon International Children's Camp, Tuesday, July 29, 2014, in Wonsan, North Korea. The camp, which has been operating for nearly 30 years, was originally intended mainly to deepen relations with friendly countries in the Communist or non-aligned world. But officials say they are willing to accept youth from anywhere - even the United States.

Wong Maye-E/AP

North Korean girls shower at the Songdowon International Children’s Camp in Wonsan, North Korea. The camp, which has been operating for nearly 30 years, was originally intended to deepen relations with other friendly countries

Paramilitary policemen raise their fists as they attend an oath-taking rally to ensure the security of the upcoming 2014 Nanjing Youth Olympic Games, in Nanjing...Paramilitary policemen raise their fists as they attend an oath-taking rally to ensure the security of the upcoming 2014 Nanjing Youth Olympic Games, in Nanjing, Jiangsu province July 29, 2014. The eastern Chinese city of Nanjing will host the 2014 Youth Olympic Games between August 16 to August 28.

China Daily/Reuters

Paramilitary policemen raise their fists as they attend an oath-taking rally to ensure the security of the upcoming 2014 Nanjing Youth Olympic Games in Nanjing, Jiangsu province. The eastern Chinese city will host the games from August 16 to August 28.

A long exposure image shows the El Portal Fire burning near Yosemite National Park, California, USA. On the morning of 28 July, the fire had burned over 2,500 acres (1,011 hectares) and was just 5% contained. More than 400 firefighters and several helicopters are battling the flames near Yosemite.

Stuart Palley/EPA

The El Portal Fire burning near Yosemite National Park, California, USA. On Monday morning the fire had burned over 2,500 acres (1,011 hectares) and was just 5% contained

The world's largest solar-powered boat, "MS Turanor PlanetSolar" sails through the Corinth Canal near the town of Corinth on July 28, 2014.  The boat arrived to Greece as part of a joint archaeological project focused on underwater exploration off one of Europe's oldest human occupation sites, the Franchthi cave in the Argolid, southeast Peloponnese. The project is taking place in one of Greece's richest archaelogical areas, the Argolid, known for its major palatial complexes in the Bronze Age that include Mycenae and Tiryns and later, classical-era city-states and sites like Argos and the ancient-theatre site of Epidaurus.

Valerie Gache/AFP

The world’s largest solar-powered boat, “MS Turanor PlanetSolar” sails through the Corinth Canal near the town of Corinth on Monday. The boat arrived to Greece as part of a joint archaeological project focused on underwater exploration off one of Europe’s oldest human occupation sites, the Franchthi cave in the Argolid, southeast Peloponnese

A man dives dive into the Mediterranean Sea during a sunny summer day in Nice, southeastern France, July 28, 2014.

Eric Gaillard/Reuters

A man dives into the Mediterranean Sea during a sunny summer day in Nice, southeastern France

Canada's Damian Warner competes in the Men's Decathlon Long Jump at the 2014 Commonwealth Games in Glasgow, Scotland, July 28, 2014.

Suzanne Plunkett/Reuters

Canada’s Damian Warner competes in the Men’s Decathlon Long Jump at the 2014 Commonwealth Games in Glasgow, Scotland

Palestinian children play on a mini ferris wheel outside an United Nations (UN) school in Jabalia in the northern Gaza strip, on July 28, 2014, on the beginning of the Muslim Eid festival ending the month-long fast of Ramadan. Israeli tank fire killed a four-year-old boy in the northern Gaza Strip, the first death since the two sides began observing an unofficial lull, Palestinian medics said.

Mahmud Hams/AFP

Palestinian children play on a mini-ferris wheel outside a UN school in Jabalia, northern Gaza, on Monday. Israeli tank fire killed a four-year-old boy in the northern Gaza strip, the first death since the two sides began observing an unofficial lull.

A litttle boy sits in a baby's bath at a temporary facility for refugees form Eastern Ukraine, 20 km outside from the Crimean capital Simferopol, on July 17, 2014. Kiev and the West blame Moscow for fuelling the fighting but those leaving the rebels' self-proclaimed republics say that joining the thousands of others who have already headed across the border into Russia is their only hope.

Max Vetrov/AFP

A litttle boy sits in a baby’s bath at a temporary facility for refugees form Eastern Ukraine, 20 km outside from the Crimean capital Simferopol, on Thursday

Taiwan Air Force AT-3 jets fly in formation over Ching Chuan Kang Air Base (CCK) in central Taichung on July 17, 2014 during a rehearsal for the base opening to the public.  Taiwan's military plans to open the CCK air force base to the public on July 19 and expects to have some 150,000 visitors.

Sam Yeh/AFP

Taiwan Air Force AT-3 jets fly over Ching Chuan Kang air base (CCK) in central Taichung on Thursday during a rehearsal for the base opening to the public

Overweight Chinese students stretch after swimming during training at a camp held for overweight children in Beijing, China

Kevin Frayer/Getty Images

Chinese students stretch after swimming during training at a camp for overweight children in Beijing, China