Members of the Columbia Accident Investigation Board listen to a worker explain part of the process of preparing a Shuttle for launch.

Members of the Columbia Accident Investigation Board listen to a worker in the Orbiter Processing Facility explain part of the process of preparing a Shuttle for launch. They are standing near Space Shuttle Endeavour. In the foreground (light jacket) is Retired Navy Adm. Harold Gehman Jr., who is chairman of the board. The board is visiting sites at KSC to become familiar with the Shuttle launch process and elements. The independent board is charged with determining what caused the destruction of the Space Shuttle Columbia and the loss of its seven-member crew on Feb. 1 during reentry.