The payload canister atop its transporter rolls contains the Columbus Lab module and payloads for space shuttle Atlantis.

At NASA's Kennedy Space Center, the payload canister atop its transporter rolls, under escort, toward Launch Pad 39A, seen at left.The canister contains the Columbus Lab module and integrated cargo carrier-lite payloads for space shuttle Atlantis on mission STS-122. They will be transferred into the payload changeout room on the pad. Atlantis is targeted to launch on Dec. 6. Photo credit: NASA/Dimitri Gerondidakis