Yuto Inoue and Tatsuro Yamada
Credit: M. Santani / Getty Images

When Japanese climbers Yuto Inoue and Tatsuro Yamada went missing on Denali in May 2008, park rangers tried a new technique to find them: They brought a photographer along on a spotting flight then later examined the high resolution photos for signs of the missing pair. The images yielded tantalizing clues, including the pair's footprints, which gave rescue personnel a direction to search. The climbers weren't located until the following year. Images from the search for a different climber, using a more sophisticated camera and a higher powered lens, led rangers to identify the frozen men connected by a rope in a shadowy area at 19,800-feet. The climber from the second search is still missing.