Courtesy Simon & Schuster
Ralston's self-portrait, 48 hours into his ordeal. Four days later, he cut off his lower arm to free himself.
Climber Aron Ralston was pinned beneath a rock for six days while climbing in Utah last year. NPR's Alex Chadwick talks with Ralston about how he cut off his own arm to survive. Ralston documented the ordeal and his recovery in his book Between a Rock and a Hard Place.