Nepalese search team members rescue a survivor of an avalanche on Mount Everest on Friday. At least 13 Nepalese guides preparing routes for commercial climbers were killed by an avalanche in the most deadly mountaineering accident ever on the world's highest peak. Prakash Mathema/AFP/Getty Images hide caption

itoggle caption Prakash Mathema/AFP/Getty Images

A photo from May 22 shows Yuichiro Miura, 80, right, and his son, Gota at their South Col camp at 26,247 feet during their climb to the top of Mount Everest. Miura became the oldest man to reach the peak. Miura Dolphins Co. Ltd./AP hide caption

itoggle caption Miura Dolphins Co. Ltd./AP

On Mount Everest, a fistfight allegedly broke out near Camp Three, between climbers and Sherpas. This file photo shows the view from Camp Three at 24,000 feet on the mountain's Lhotse Face. Courtesy of Alan Arnette/AP hide caption

itoggle caption Courtesy of Alan Arnette/AP