Technicians work the engine installer to maneuver main engine 1 into place on space shuttle Endeavour.

In the Orbiter Processing Facility bay 2, technicians work the engine installer to maneuver main engine 1 into place on space shuttle Endeavour. The scheduled launch vehicle for the STS-126 mission, Endeavour will deliver a multi-purpose logistics module to the International Space Station. Launch is targeted for Nov. 10. Endeavour is also the backup shuttle, if needed for rescue, for the STS-125 mission in October that will make repairs on the Hubble Space Telescope. For that purpose, it is designated STS-400. Photo credit: NASA/Jim Grossmann