Shuttle Program Manager Ron Dittemore (third from right) and Ralph Roe (fourth from right), with the Orbiter Work Group, JSC, look at Columbia debris being held my a member of the Columbia Restoration Project Team. The team is examining pieces and attempting to reconstruct the orbiter as part of the investigation into the accident that caused the destruction of Columbia on its return to Earth from mission STS-107. To date, four shipments have arrived from Barksdale AFB, Shreveport, La., the collection point for debris.