A Rockwell worker takes a technical documentation image of space shuttle Endeavour designated NASA 911.

A Rockwell worker at the space shuttle's Palmdale Final Assembly Facility in Palmdale, Calif., takes a technical documentation image of space shuttle Endeavour as it is prepared for its first ferry flight to NASA's Kennedy Space Center in Florida aboard the agency's Shuttle Carrier Aircraft, or SCA, designated NASA 911.

Endeavour is scheduled to return to California in 2012, where it will be on public display at the California Science Center in Los Angeles. Its ferry flight across America is targeted for mid-September. Endeavour was the last space shuttle added to NASA’s orbiter fleet. During the course of its 19-year career, Endeavour spent 299 days in space during 25 missions. For more information on shuttle transition and retirement work, visit http://www.nasa.gov/transition. Photo credit: NASA/ Rockwell International Space Systems Division