Space shuttle Columbia, seen here launching in 1993, paved a brilliant legacy before its tragic end. The shuttle disintegrated over east Texas on its landing descent to Kennedy Space Center on February 1, 2003, at the conclusion of a microgravity research mission. Columbia was the oldest orbiter in the fleet and the first shuttle to orbit Earth. It was also the heaviest, weighing 178,000 pounds (80,800 kilograms).
Photograph courtesy NASA
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