That is filled with hardware for the STS-125 mission to service NASA's Hubble Space Telescope.

On Launch Pad 39A at NASA's Kennedy Space Center in Florida, workers begin to close the doors of space shuttle Atlantis' payload bay that is filled with hardware for the STS-125 mission to service NASA's Hubble Space Telescope. In view at the bottom of the bay are the Flight Support System with the Soft Capture mechanism and Multi-Use Lightweight Equipment Carrier with the Science Instrument Command and Data Handling Unit, or SIC&DH. Atlantis' crew will service NASA's Hubble Space Telescope for the fifth and final time. The flight will include five spacewalks during which astronauts will refurbish and upgrade the telescope with state-of-the-art science instruments. As a result, Hubble's capabilities will be expanded and its operational lifespan extended through at least 2014. Launch is scheduled for 2:01 p.m. EDT on May 11. Photo credit: NASA/Kim Shiflett