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John Callahan is an American cross-country skier. He competed in the men's 30 kilometre classical event at the 1992 Winter Olympics. In 2003, he was the leader of an expedition to Mount Everest, appearing in the documentary film Skiing Everest.
Not who you're looking for? Others named John Callahan: American actor (1953-2020) · American baseball player (1874-1954) · cartoonist (1951–2010) · American bank robber and later underworld figure in Wichita,
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