Edmund Hillary and Tensing Norgay conquered the summit of Mt. Everest for the first time in 1953. In 1993 a Catalan expedition made the first attempt to clean and save the roof of the world. The members of the expedition wished to pay homage, on the 40th anniversary of the ascent, to the first man to reach the highest peak in the world and, at the same time, to leave a message for future expeditions.