Remembering Apollo 1
From left, Apollo 1 astronauts Virgil I. "Gus" Grissom, Edward White and Roger Chaffee pose in front of their Saturn 1 launch vehicle at Launch Complex 34 at the Kennedy Space Center.
On Jan. 27, 1967, the crew was sitting atop the launch pad for a pre-launch test when a fire broke out in their capsule. The investigation into the fatal accident led to major design changes, making the Apollo spacecraft safer for the coming journeys to the moon.
Image Credit: NASA
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