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Investigators still have no direct link between flying foam and a hole in the leading edge of the shuttle Columbia's left wing, but initial testing ruled out extensive tile damage from foam hitting ...

Columbia accident investigators said Tuesday that a chunk of flying foam insulation hit the orbiter's left wing farther out than previously believed. If the assessment is correct, the blow may have ...

In this image from television on Friday, a chunk of foam is fired at high speed into a space shuttle wing panel during a test in San Antonio. Officials say the test lends credence to the theory that ...