Chris McCandless' log entry for two photos from Sept. 11, 1990, of himself, right, and friend, Wayne Westerberg. Director Sean Penn's movie Into the Wild is based on McCandless' journal entries.

The story of Chris McCandless' life and death served as the basis of the best-selling book and feature film "Into the Wild." Until now, some of the key factors of Chris' story had been kept secret.