On February 2, 2011, Cory Richards, Denis Urubko, and Simone Moro became the first to ascend Gasherbrum II in winter. Despite being buried by a class-four avalanche, they reached the summit at 11:30 am, without supplemental oxygen or porters. Richards, who was the first American to climb an eight-thousander in winter, filmed the expedition, which he turned into the film Cold.