The Patrick Air Force Base Honor Guard stands at attention during Taps at the conclusion of the STS-107 Columbia Crew Memorial Service held at KSC.

The Patrick Air Force Base Honor Guard stands at attention during "Taps" at the conclusion of the STS-107 Columbia Crew Memorial Service held at KSC. The crew were lost on Feb. 1, 2003, over East Texas as they returned to Earth after the 16-day research mission STS-107. Also taking part in the service were NASA Administrator Sean O'Keefe, former KSC Director Robert Crippen, astronaut Jim Halsell, several employees and area clergymen. Crippen was the first to fly Columbia in 1981; Halsell first flew Columbia in 1994 and again in 1997.