Shuttle Doomed at Takeoff
Telltale Heat Spike Was Recorded After Debris Strike

Investigators now have the strongest evidence yet that the space shuttle Columbia's left wing was critically punctured during liftoff, when falling debris started the fatal chain of events that led to the breakup of the shuttle when it re-entered Earth's atmosphere, ABCNEWS has learned.
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New fuel tank design linked to shuttle disaster

The Columbia shuttle disaster may been triggered by a combination of a new external fuel tank design and ageing of the spacecraft, a Columbia Accident Investigation Board press conference was told on Tuesday.
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