This handout photo taken on April 17, 2016, and received by the Technical Climbing Club of Myanmar on May 19, 2016, shows Win Ko Ko crossing a crevasse on the way to the summit of Mount Everest.
(Nyi Nyi Aung, AFP/Getty Images)
In this Feb. 19, 2016, photo, trekkers make their way to Dingboche, a popular Mount Everest base camp, in Pangboche, Nepal.
