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On Thursday, ascent video showed a spray of whitish material streaming away from the shuttle's underside after the impact, presumably from a piece of foam that hit the belly of the orbiter. Today, based on analysis of radar data, engineers believe the debris may have been the remnant of a...
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Online stream:Watch live onCBSNin the video player above or on yourmobile or streaming device— coverage begins at 8:15 a.m. EDT