Shuttle Columbia Investigation NPR's Joe Palca reports that more than 12,000 items supposedly from the shuttle Columbia have been collected near the Texas-Louisiana border. NASA officials say they're making good progress in their investigation into why the shuttle went down.

Shuttle Columbia Investigation

Shuttle Columbia Investigation

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NPR's Joe Palca reports that more than 12,000 items supposedly from the shuttle Columbia have been collected near the Texas-Louisiana border. NASA officials say they're making good progress in their investigation into why the shuttle went down.