Pilot Greg H. Johnson prepares to perform on the Shuttle Landing Facility runway at NASA's Kennedy Space Center.

STS-134 Pilot Greg H. Johnson prepares to perform touch-and-go landings aboard a Shuttle Training Aircraft (STA) on the Shuttle Landing Facility runway at NASA's Kennedy Space Center in Florida.

An STA is a Gulfstream II jet that is modified to mimic the shuttle's handling during the final phase of landing. Kelly and Johnson will practice landings as part of standard training before space shuttle Endeavour's launch to the International Space Station. Endeavour and its crew will deliver the Express Logistics Carrier-3, Alpha Magnetic Spectrometer-2 (AMS), a high-pressure gas tank and additional spare parts for the Dextre robotic helper to the station. This will be the final spaceflight for Endeavour. For more information visit, www.nasa.gov/mission_pages/shuttle/shuttlemissions/sts134/index.html. Photo credit: NASA/Kim Shiflett