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CAPE CANAVERAL, Fla. -- In Orbiter Processing Facility Bay 3 at NASA’s Kennedy Space Center, workers check the progress of the testing of the Orbiter Transport System on space shuttle Discovery. 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