The rack insertion device in the foreground is called into duty inserting science racks into Multi-Purpose Logistics Module Leonardo during processing for space shuttle.

In the Space Station Processing Facility at NASA's Kennedy Space Center in Florida, the rack insertion device in the foreground is called into duty inserting science racks into Multi-Purpose Logistics Module Leonardo, in the background at left, during processing for space shuttle Discovery's STS-131 mission to the International Space Station.

The science racks Leonardo delivers will be transferred to laboratories on the station. Three spacewalks during STS-131 will include work to attach a spare ammonia tank assembly to the station's exterior and return a European experiment from outside the station's Columbus module. STS-131 will be the 33rd shuttle mission to the station. Launch is targeted for March 18, 2010. Photo credit: NASA/Amanda Diller