Inside the Challenger Disaster

This year marks 30 years since the Challenger explosion, which killed all seven of the space shuttle's passengers, including Christa McAuliffe, who would have been the first teacher in space. On the night before the disaster, multiple engineers from Morton Thiokol recommended that the launch be delayed. Their concerns centered around the unusually cold weather forecast, as frigid temperatures could interfere with the O-ring seals in the shuttle's rocket boosters. Engineer Roger Boisjoly led the presentation of their concerns. But NASA pushed back.