The Air Force is remembering three Apollo astronauts who died 49 years ago at Cape Canaveral.
Virgil "Gus" Grissom, Edward White, and Roger Chaffee died during a command module fire at launch complex 34.
It was during a launch pad test for what would be the first Apollo mission, NASA’s program to send humans to the moon.
Speakers from NASA, the Air Force and Navy will remember the three astronauts, and family members will light a candle at the launch complex in their memory. At 6:31 pm, the time of the fire, there will be a moment of silence.
The tragedy delayed manned spaceflight for 20 months. The Apollo 1 backup crew returned to flight on Apollo 7.
