Marco_Siffredi
Marco Siffredi (22 May 1979 – 8 September 2002) was a French snowboarder and mountaineer who hailed from a climbing family; his father was a mountain guide, and his older brother Pierre had died in an avalanche in their hometown of Chamonix, France. Siffredi was the first to descend Mount Everest on a snowboard, completing this feat in 2001 via the Norton Couloir. In 2002, he disappeared after making his second Everest summit, while attempting to snowboard the Hornbein Couloir; his body has never been found.