Employees line up to visit with STS-134 Pilot Gregory H. Johnson left and Michael Fincke following a crew return event.

Employees line up to visit with STS-134 Pilot Gregory H. Johnson, left, and Mission Specialist Michael Fincke following a crew return event at NASA's Kennedy Space Center in Florida.

Commander Mark Kelly, Johnson and Mission Specialists Fincke, Greg Chamitoff, Andrew Feustel and European Space Agency astronaut Roberto Vittori lifted off May 16, 2011, aboard space shuttle Endeavour. During the nearly 16-day STS-134 mission, Endeavour delivered to the International Space Station the Alpha Magnetic Spectrometer (AMS) and spare parts, including two S-band communications antennas, a high-pressure gas tank and additional spare parts for Dextre. This was the 36th shuttle mission to the station and Endeavour's 25th and final flight. For more information, visit www.nasa.gov/mission_pages/shuttle/shuttlemissions/sts134/main/index.html. Photo credit: NASA/Kim Shiflett