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Columbia Anniversary

Brad Smith, left, Scott Whitener, James Atwell,bottom right, and Derry Bilby, top right, all employees of the NASA contractor, United Space Alliance and members of the mishap investigation team, unpack and get a close up look of space shuttle Columbia debris as they attempt to determine the identity of the item and catalog it, Monday Feb. 10, 2003, at Barksdale Air Force Base, La. The item was determined to be the the window assembly in front of the mission pilot seating area. U. S. Navy Cmdr. WilliamMcCool, was the mission's pilot. (AP Photo/Tony Gutierrez )

Credit: ASSOCIATED PRESS