PHOTOS: NASA's Darkest Moments

NASA marks anniversaries of Challenger, Columbia, Apollo 1 accidents.

PHOTOS: Challenger, Columbia, Apollo: NASA's Darkest Moments

Space Disasters
Space Disasters
Space Disasters
Space Disasters
Space Disasters
Space Disasters
Space Disasters
Space Disasters
Space Disasters
Space Disasters
Space Disasters
Astronauts Roger Chaffee, Ed White and Gus Grissom, left to right, were chosen for the first flight of the Apollo spacecraft, which would eventually take astronauts to the moon. But on Jan. 27, 1967, while running a routine launch test in the ship's cabin, they were killed in a flash fire. (NASA)
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