In the RLV Hangar at KSC Shuttle Launch Director Mike Leinbach look at one of Space Shuttle Columbia's tires.

In the RLV Hangar at KSC, Shuttle Launch Director Mike Leinbach (left), former payload specialist Dr. Roger Crouch (center) and NASA Chief of Staff and White House liaison Courtney Stadd look at one of Space Shuttle Columbia's tires. The debris is one of more than 35,000 pieces collected so far. More than 1,218 pieces have been identified. The search of more than 500,000 acres of primary recovery area for Columbia material has passed the halfway mark. To date about 28 percent of Columbia, by weight, has been delivered to the hangar.