Jim Whittaker in 1975, before his unsuccessful attempt to summit K2, the world’s second-highest mountain. More than a decade earlier, he had successfully topped Mount Everest, the first American to do so.

Jim Whittaker in 1975, before his unsuccessful attempt to summit K2, the world’s second-highest mountain. More than a decade earlier, he had successfully topped Mount Everest, the first American to do so.