In the Vehicle Assembly Building at NASA's Kennedy Space Center in Florida, workers check the progress of external fuel tank ET-131 as it is lowered into a high bay for checkout. ET-131 will be used on space shuttle Endeavour's STS-127 mission. Payload for the mission is the Japanese Experiment Module's Experiment Logistics Module-Exposed Section, or ELM-ES. Launch is targeted for June. Photo credit: NASA/Kim Shiflett