United Space Alliance technicians install a heat shield around one of space shuttle Endeavour's replica shuttle main engines.

In Orbiter Processing Facility Bay 2 at NASA’s Kennedy Space Center in Florida, United Space Alliance technicians install a heat shield around one of space shuttle Endeavour’s replica shuttle main engines.

The work is part of Transition and Retirement of the remaining space shuttles, Endeavour and Atlantis. 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/ Jim Grossmann