CAPE CANAVERAL, Fla. – In Orbiter Processing Facility-2 at NASA’s Kennedy Space Center in Florida, signatures line the walls of the White Room as space shuttle Endeavour is powered down for the final time. The room affords access to the shuttle as it is undergoing processing in the facility. Anyone visiting the interior of the shuttle – astronauts, technicians and guests alike - is given the opportunity to “autograph” a wall of the room. Endeavour is being prepared for public display at the California Science Center in Los Angeles. Its ferry flight to California is targeted for mid-September. Endeavour was the last space shuttle added to NASA’s orbiter fleet. Over the course of its 19-year career, Endeavour spent 299 days in space during 25 missions. For more information, visit http://www.nasa.gov/transition. Photo credit: NASA/Ben Smegelsky