Gus Grissom (1926–1967) was slated to be one of the first men to walk on the Moon. Regrettably, during a training exercise and pre-launch test of Apollo 1 on January 27, 1967, the spacecraft caught fire with Grissom, Ed White (1930–1967), and Roger B. Chaffee (1935–1967) onboard. All three astronauts were killed.