Workers secure space shuttle Endeavour's payload bay doors for the shuttle's move to the Vehicle Assembly Building.

In Orbiter Processing Facility-2 at NASA's Kennedy Space Center in Florida, workers secure space shuttle Endeavour's payload bay doors for the shuttle's upcoming move to the Vehicle Assembly Building.

The move, or "rollover," is targeted for Dec. 12. The Tranquility module, the payload for Endeavour's STS-130 mission to the International Space Station, will be installed in the payload bay after the shuttle has reached the pad. Endeavour's launch is targeted for Feb. 4, 2010. For information on the STS-130 mission and crew, visit http://www.nasa.gov/mission_pages/shuttle/shuttlemissions/sts130/index.html. Photo credit: NASA/Jack Pfaller