In the Vehicle Assembly Building at NASA's Kennedy Space Center, the external tank for space shuttle Discovery is being lowered into place in high bay 3 between the solid rocket boosters waiting on the mobile launcher platform. The tank will be mated to the boosters. Discovery is targeted to launch May 31 on the STS-124 mission to the International Space Station. On the mission, Discovery will transport the Kibo Japanese Experiment Module - Pressurized Module (JEM-PM) and the Japanese Remote Manipulator System (JEM-RMS) to the space station to add to the Kibo laboratory. Photo credit: NASA/Kim Shiflett