This photo taken on March 28, 2017 shows firefighters flying a drone to investigate the site of an avalanche that killed seven Japanese high school students and a teacher during a mountain-climbing outing on March 27 in the town of Nasu, Tochigi prefecture. A total of 52 students and 11 teachers from seven high schools were on a three-day mountaineering expedition when disaster struck. (Photo by JIJI PRESS / AFP) / Japan OUT / JAPAN OUT
