The North Face of the Eiger was long notorious as the most dangerous climb in the Swiss Alps, one that had claimed the lives of numerous mountaineers. In February 1966, two teams - one German, the other British-American - aimed to climb it by a new direct route. Astonishingly, the two teams knew almost nothing about each other's attempt until both arrived at the foot of the face. The race was on. John Harlin led the four-man British-American...