A festival goer uses a hula hoop, as revelers gather ahead of this weekends Glastonbury Festival of Music and Performing Arts on Worthy Farm in Somerset, southwest England, on June 25, 2014. US metal giants Metallica will play this year's coveted Saturday night headline spot at Britain's Glastonbury festival, organisers announced Thursday. It will be the “Master of Puppets” four-piece's first appearance at the legendary festival, held in south west England, following on from The Rolling Stones' Worthy Farm debut last year. (Photo by Leon Neal/AFP Photo)

Students receive a group punishment during a military-style close-order drill class at the Qide Education Center in Beijing February 19, 2014. The Qide Education Center is a military-style boot camp which offers treatment for internet addiction. As growing numbers of young people in China immerse themselves in the cyber world, spending hours playing games online, worried parents are increasingly turning to boot camps to crush addiction. Military-style boot camps, designed to wean young people off their addiction to the internet, number as many as 250 in China alone. (Photo by Kim Kyung-Hoon/Reuters)

Polar Bear club swimmers take their annual swim in the sea at Coney Island in New York City on January 1, 2014. (Photo by Curtis Means/ACE/INFphoto.com)

“24.27 N, 81.44 W. These coordinates mark the spot of the final resting place of an old brave soldier, the USS General Hoyt S. Vandenberg. In 2009 it underwent a complete change when the creaky steel monster became a mystical bearer of secrets. In May of that year, the Vandenberg was lowered down into the darkness of the ocean off the coast of Florida to become an artificial reef, where it would dwell in rigor mortis at a depth of 130 feet. This lively, animate, secretive nothingness, this menacing, wild emptiness would haunt and seduce the renowned Austrian photographer and passionate diver Andreas Franke...”. – The Sinking World (Photo by Andreas Franke)

Meri Nirmala Sari, 11, poses in her traditional costume before a performance August 6, 2002 in Ubud, Bali, Indonesia. Meri dances with the Gunung Sari Peliatan dance group and has become a professional. She started dancing at age 5. (Photo by Paula Bronstein/Getty Images)

South Korean environmentalists participates in a rally held to commemorate the Fukushima nuclear disaster on the eve of the one year anniversary of Japan's earthquake and tsunami on March 10, 2012 in Seoul, South Korea. Currently four nuclear power plants are in operation in South Korea while the government plans to increase the number of reactors to 32 by the year 2021. (Photo by Chung Sung-Jun/Getty Images)

Pakistani children cool themselves off in a stream in Peshawar, Pakistan, Monday, June 29, 2015, during Muslim's fasting month of Ramadan. (Photo by Mohammad Sajjad/AP Photo)

A model jumps during a photo shooting, in Milan, Italy, Friday, January 15, 2016. Men's fashion week starts today and will run until Tuesday, January 19. (Photo by Luca Bruno/AP Photo)