An internal NASA report last December criticized the way insulating foam was applied to the shuttle's fuel tank, The New York Times reported. A foam accident caused the destruction of the Columbia in 2003, and a large piece of foam broke from the Discovery when it launched July 26. The report said the foam debris continues to present a risk two years after NASA began efforts to correct the problem. A NASA spokesman did not comment directly on the report but said the agency still must address issues with foam. The shuttle program has been grounded indefinitely.
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