CAPE CANAVERAL, Fla. - In the Space Station Processing Facility at NASA's Kennedy Space Center in Florida, workers move the scales toward the multi-purpose logistics module Leonardo to determine its weight and center of gravity. Leonardo will be transported to Launch Pad 39A and installed into space shuttle Discovery for its upcoming flight. The seven-member STS-131 crew will deliver Leonardo, filled with resupply stowage platforms and racks, to the International Space Station. STS-131 will be the 33rd shuttle mission to the station and the 131st shuttle mission overall. Launch is targeted for April 5. For information on the STS-131 mission and crew, visit http:__www.nasa.gov_mission_pages_shuttle_shuttlemissions_sts131_index.html. Photo credit: NASA_Jack Pfaller