At a press conference the day after the January 27, 1967, Apollo 1 accident, a NASA spokesperson explains the cause of the flash fire that broke out inside the cabin of the spacecraft during a launch pad test. The vehicle was being prepared for the first piloted space flight. The tragedy ended in the deaths of all three astronauts on board: Lt. Col. Virgil I. Grissom, Lt. Col. Edward H. White and Roger B. Chaffee.