CAPE CANAVERAL, Fla. -- In Orbiter Processing Facility-1 at NASA's Kennedy Space Center in Florida, removal of main engine no. 3 from space shuttle Atlantis is under way. Inspection and maintenance of each main engine is standard procedure following a shuttle mission. Some of the engines maintained and stored in the engine shop could be used for Atlantis, on what currently is planned as the 'launch on need,' or potential rescue mission for Endeavour's STS-134 mission, targeted for launch Feb. 26, 2011. For information, visit www.nasa.gov_shuttle. Photo credit: NASA_Jack Pfaller

CAPE CANAVERAL, Fla. -- In Orbiter Processing Facility-1 at NASA's Kennedy Space Center in Florida, the Hyster engine lift moves main engine no. 3 away from space shuttle Atlantis. Inspection and maintenance of each main engine is standard procedure following a shuttle mission. Some of the engines maintained and stored in the engine shop could be used for Atlantis, on what currently is planned as the 'launch on need,' or potential rescue mission for Endeavour's STS-134 mission, targeted for launch Feb. 26, 2011. For information, visit www.nasa.gov_shuttle. Photo credit: NASA_Jack Pfaller

CAPE CANAVERAL, Fla. -- At NASA's Kennedy Space Center in Florida, space shuttle Atlantis' main engine no. 3 is moved out of Orbiter Processing Facility-1 after removal from the shuttle. Inspection and maintenance of each main engine is standard procedure following a shuttle mission. Some of the engines maintained and stored in the engine shop could be used for Atlantis, on what currently is planned as the 'launch on need,' or potential rescue mission for Endeavour's STS-134 mission, targeted for launch Feb. 26, 2011. For information, visit www.nasa.gov_shuttle. Photo credit: NASA_Jack Pfaller