Pemba, 34, and three members of his Norit K2 team—leader Wilco van Rooijen, Marco Confortola, and Gerard McDonnell—reached the Bottleneck minutes after the serac fell.

Pemba Sherpa Gyalije (Image Courtesy: Pemba) It took 48 hours for nature to create one of the most chilling tales of tragedy, triumph and heroism in mountaineering history.

The documentary tells the story of the August 2008 disaster on K2, the Earth's second-highest mountain, in which 11 climbers died. NPR's Rachel Martin spoke with the film's director, Nick Ryan ...

"Daytime, Pemba is OK," says Ngawang Karma Sherpa. "But nighttime…" Ngawang Karma's broken English trails off. She crinkles her nose skeptically and shakes her hands in a "so-so" gesture. Last ...