The redesigned external fuel tank that will launch Space Shuttle Atlantis is lowered into the checkout cell.

In NASA's Vehicle Assembly Building, the redesigned external fuel tank that will launch Space Shuttle Atlantis on the next shuttle mission, STS-115, is lowered into the checkout cell where it will undergo further work. Designated ET-118, the tank will fly with many major safety changes, including the removal of the protuberance air load ramps. Photo credit: NASA/George Shelton