A launch pad fire during Apollo program tests at Cape Canaveral, Florida, kills astronauts Virgil “Gus” Grissom, Edward H. White II, and Roger B. Chaffee. An investigation indicated that a faulty electrical wire inside the Apollo 1 command module was the probable cause of the fire. The astronauts, the first Americans to die in a spacecraft, had been participating in a simulation of the Apollo 1 launch scheduled for the next month.