KENNEDY SPACE CENTER, FLA. - In the Orbiter Processing Facility, the Hyster lift raises the third Space Shuttle Main Engine (SSME) into position behind Discovery for installation. Discovery is designated as the Return to Flight vehicle for mission STS-114. Recent improvements to the SSME include the introduction of redesigned high-pressure turbopumps into the SSME fleet. The new pumps are designed and built by Pratt and Whitney at West Palm Beach, Fla. SSMEs and the Pratt and Whitney turbopumps are tested at Stennis Space Center in Mississippi. Engines and engine components are delivered to Kennedy Space Center to be prepared for flight.