Inside the Vehicle Assembly Building at NASA's Kennedy Space Center is lowered into a checkout cell for processing.

Inside the Vehicle Assembly Building at NASA's Kennedy Space Center, the external tank for space shuttle Discovery is lowered into a checkout cell for processing. The tank will be stacked with solid rocket boosters for Discovery's launch on the STS-124 mission. On the mission, the shuttle will transport the Kibo Japanese Experiment Module - Pressurized Module and the Japanese Remote Manipulator System. Launch is targeted for May 25. Photo credit: NASA/Jim Grossmann