The sun sets behind Launch Pad 39A at NASA's Kennedy Space Center the payload canister.

The sun sets behind Launch Pad 39A at NASA's Kennedy Space Center where the payload canister with the Japanese Experiment Module - Pressurized Module and the Japanese Remote Manipulator System, or RMS, inside awaits cargo transfer to the payload changeout room above. The changeout room is the enclosed, environmentally controlled portion of the service structure that supports cargo delivery to the pad and subsequent vertical installation into an orbiter's payload bay. From the payload changeout room, the pressurized module and RMS then will be transferred into space shuttle Discovery’s payload bay. Launch is targeted for May 31. Photo credit: NASA/Kim Shiflett