Boeing-Rocketdyne technicians secure on a stand the third Space Shuttle Main Engine for Discovery's Return to Flight mission STS-114.

Inside the KSC Engine Shop, Boeing-Rocketdyne technicians secure on a stand the third Space Shuttle Main Engine for Discovery’s Return to Flight mission STS-114. The engine is returning from NASA’s Stennis Space Center in Mississippi where it underwent a hot fire acceptance test. Typically, the engines are installed on an orbiter in the Orbiter Processing Facility approximately five months before launch.