Scott Eugene Fischer (December 24, 1955 - May 11, 1996) was an American mountaineer and mountain guide. He was renowned for his ascents of the world's highest mountains made without the use of supplemental oxygen. Fischer and Wally Berg were the first Americans to summit Lhotse (27,940 feet / 8516 m), the world's fourth highest peak. Fischer, Charley Mace, and Ed Viesturs summitted K2 (28,251 feet/ 8611m) without supplemental oxygen. Fischer first climbed Mount Everest (29,029 feet / 8,848 m) in 1994 and later died during the 1996 blizzard on Everest while descending from the peak.