Bay 2 workers install a camera pack on the orbiter boom sensor system in space shuttle Endeavour's payload bay.

In the Orbiter Processing Facility bay 2 at NASA's Kennedy Space Center, workers install a camera pack on the orbiter boom sensor system in space shuttle Endeavour's payload bay. The scheduled launch vehicle for the STS-126 missions, 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 NASA's Hubble Space Telescope. For that purpose, it is designated STS-400. Photo credit: NASA/Jim Grossmann