Two men were about to land on the moon, and Mission Control in Houston was thrumming with tension. In the science-operations room, Gerald Schaber, a geologist, needed something to do while he waited for the lunar module to touch down.

Schaber had come from northern Arizona, where engineers had warped the desert with dynamite to make a cratered landscape where the astronauts could train. His job didn’t start until Neil Armstrong and Buzz Aldrin stepped out of the lunar module and began to explore the slate-colored surface. And the wait was getting to him.

Read more at The Atlantic.