A Russian Sukhoi Su-25 fighter jet takes off during the withdrawal of Russian troops from Syria at Hmeymim airbase, Syria, March 16, 2016. (Photo by Vadim Grishankin/Reuters/Russian Ministry of Defence)

Wingsuit flyer contestant Melissa Pemberton of the U.S. jumps off a mountain at Tianmen Mountain National Park in Zhangjiajie, Hunan province October 19, 2014. (Photo by Reuters/China Daily)

A Mai-Mai rebel soldier shows off his guns at a checkpoint near the Mugunga refugee camp in Zaire; 1996. (Photo by Carol Guzy/The Washington Post)

Tom Palmer, the England lock, dives off at the 134 meter high Nevis Bungy jump during an England IRB Rugby World Cup 2011 team visit on September 12, 2011 in Queenstown, New Zealand. (Photo by David Rogers/Getty Images)

Soyuz VS01 is lifts off at the European Spaceport on October 21, 2011 in Kourou, French Guiana. The Soyuz VS01 rocket is carrying the first two satellites of Europe's Galileo navigation satellite system into orbit. (Photo by Stephane Corvaja/ESA via Getty Images)

The Queen Mary 2 is saluted by the HMB Endeavour, the replica of Captain James Cook's ship, on March 4, 2012 off the coast of Victoria, Australia. (Photo by James Morgan/Carnival Australia via 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)

Rita Ora strips down to promote the new Tezenis lingerie range on December 7, 2016. The British singer, 26, shows off her curves in the latest campaign for the Italian brand. (Photo by Splash News/Tezenis)