An inflatable pig flies above Battersea Power Station in a recreation of Pink Floyd's “Animals” album cover on September 26, 2011 in London, England. The classic Pink Floyd album artwork was recreated to mark the release of several digitally remastered versions of their albums. (Photo by Oli Scarff/Getty Images)

Jensen a two-year-old False Map turtle, from the Mississippi River, gets used to his new home at Blackpool Sea Life Centre on February 13, 2012 in Blackpool, England. (Photo by Christopher Furlong/Getty Images)

A weeping South Vietnamese mother and her three children are shown on the deck of this amphibious command ship being plucked out of Saigon by U.S. Marine helicopters in Vietnam, April 29, 1975. (Photo by AP Photo)

Filipino Muslims ride on top of a vehicle as they celebrate the end of the holy month of Ramadan in Cotabato city, in southern Philippines, July 16, 2015. Picture taken July 16, 2015. (Photo by Marconi Navales/Reuters)

Models present creations from the La Perla Autumn/Winter 2017 collection during New York Fashion Week in the Manhattan borough of New York, U.S., February 9, 2017. (Photo by Brendan McDermid/Reuters)

A pink elephant balloon, one of the entries in the Canadian Hot Air Balloon Championships, lands in a field in High River September 27, 2013. The event is a qualifier for the World Hot Air Balloon Championships in Sao Paulo in 2014. (Photo by Mike Sturk/Reuters)

A street performer jumps in the air inside Central Park as the colors of autumn become more prevalent in New York, October 29, 2015. (Photo by Lucas Jackson/Reuters)

A giant new exhibition space created by famed graffiti artist Banksy opens to the public on May 3, 2008 in London, England. The disused tunnel beneath Waterloo station has been transformed by 30 artists from around the world. The three day event, tagged as the “Cans festival”, also invites the public to add their own stencil art. (Photo by Jim Dyson/Getty Images)