It will be installed in shuttle Discovery for the shuttle's STS-131 mission to the International Space Station.

In Orbiter Processing Facility Bay 3 at NASA's Kennedy Space Center in Florida, a space shuttle main engine fills the aperture where it will be installed in shuttle Discovery for the shuttle's STS-131 mission to the International Space Station.

The seven-member STS-131 crew will deliver a Multi-Purpose Logistics Module filled with resupply stowage platforms and racks to be transferred to locations around the station. Three spacewalks 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. Discovery's launch, targeted for March 18, 2010, will initiate the 33rd shuttle mission to the station. 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