In the White Room of Launch Pad 39A at NASA's Kennedy Space Center in Florida, STS-134 Mission Specialists Roberto Vittori, left, and Michael Fincke touch fists as they prepare to board Space Shuttle Endeavour during the Terminal Countdown Demonstration Test (TCDT). Part of TCDT includes practising the final hours of a real launch day when astronauts put on their launch-and-entry suits, ride to the pad in the Astrovan and strap into the Shuttle.