Anatoli Boukreev, Kazakh mountaineer and explorer (born 1958)

Anatoli Nikolaevich Boukreev was a Kazakh mountaineer who made ascents of 10 of the 14 eight-thousander peaks—those above 8,000 m (26,247 ft)—without supplemental oxygen. From 1989 through 1997, he made 18 successful ascents of peaks above 8,000 m.