Asian Trekking is a commercial adventure company based out of Kathmandu, Nepal started by Sherpa Ang Tshering. In 2001, it was recorded that Asian Trekking ran 25 large mountain expeditions per year. Asian Trekking made international news when in 2006 four of its clients and two of its Sherpas died in a single season. One of their clients, David Sharp, died near the summit and this event became the center of an international climbing ethics controversy. Founder of the company Ang said that climbers can die if they use all their energy getting to the summit of Mount Everest, only to be too fatigued for the descent.