Apollo 1

Apollo 1 was the name NASA assigned to the AS-204 crew after the fatal January 27, 1967 launch-pad fire at Cape Kennedy Launch Complex 34. The mission had been scheduled as the first crewed Apollo flight, with Gus Grissom, Ed White, and Roger Chaffee training in command module CSM-012 for a planned February 1967 launch. During a preflight test, a fire swept through the command module and all three astronauts died. NASA's investigation and redesign work led to major command-module, procedural, and safety changes before crewed Apollo flights resumed with Apollo 7. NASA later formally reserved Apollo 1 for the lost crew, while the AS-204 launch vehicle later flew as Apollo 5 with a lunar module payload.