A runner participates in "Tenzing Hillary Marathon", the highest marathon in the world in Nepal, May 29, 2012. The 10th edition of the Tenzing Hillary Mount Qomolangma Marathon has successfully concluded after all the runners reached Namche Bazar (3,440 meters above sea level) while running down from Mt. Qomolangma base camp (5,364 meters above sea level) on Tuesday. (Xinhua/Liu Siu Wai)