Climbers prepare to retreat at the base camp of Mount Qomolangma, also known as Mount Everest, in southwest China's Tibet Autonomous Region, April 30, 2015. All Spring mountaineering activities were suspended on the north slope of Mount Qomolongma, according to Chinese Mountaineering Association. An 8.1-magnitude quake shook neighboring Nepal on Saturday, causing avalanches that killed at least 18 climbers on the Nepalese side of the mountain. (Xinhua)
