In Orbiter Processing Facility Bay 3 at NASA's Kennedy Space Center moves in place under the belly of Discovery.

In Orbiter Processing Facility Bay 3 at NASA’s Kennedy Space Center, the Orbiter Transport System, or OTS, moves in place under the belly of space shuttle Discovery. The OTS will help move the orbiter on its rollover to the Vehicle Assembly Building. 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/Troy Cryder