The Challenger Shuttle 25 Years Later

Challenger began its life as STA-099, a test vehicle, above, designed to explore the stress limits of a lighter-weight frame that engineers at NASA and its contractor Rockwell had
NASA

Prototype
Challenger began its life as STA-099, a test vehicle, above, designed to explore the stress limits of a lighter-weight frame that engineers at NASA and its contractor Rockwell had designed.

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