Biggest (or 2nd so) ever debris hit on shuttle -- spotted after landing
NASA SpaceFlight.com -- Atlantis suffered major MMOD hit
By Chris Bergin, 10/4/2006 1:09:00 PM
http://www.nasaspaceflight.com/content/?cid=4848
Shuttle orbiter Atlantis was hit by a MMOD (micrometeoroid/orbiting debris) event during STS-115, which NASA is describing as the "first or second largest hit" in the history of the Shuttle program.
While the debris hit a radiator panel on the cargo bay doors, NASA are concerned, given the size of the MMOD, which they claim was large enough to have penetrated - possibly critically - Atlantis' heatshield.