FILE - In this Oct. 27, 2011 file photo, the last light of the day sets on Mount Everest as it rises behind Mount Nuptse as seen from Tengboche, in the Himalaya's Khumbu region, Nepal. An avalanche swept the slopes of Mount Everest on Friday, April 18, 2014, along a route used to ascend the world's highest peak, killing at least six Nepalese guides and leaving nine more missing, officials said. (AP Photo/Kevin Frayer, File) ( Nepal Everest Avalanche )