On Launch Pad 39A at NASA's Kennedy Space Center in Florida, the clamshell doors of space shuttle Discovery's payload bay are ready to be closed in preparation for the STS-133 launch to the International Space Station.
Targeted to launch Nov. 1, STS-133 will carry the Permanent Multipurpose Module (PMM) packed with supplies and critical spare parts, as well as Robonaut 2 (R2) to the station. Photo credit: NASA/Jack Pfaller