KENNEDY SPACE CENTER, FLA. - STS-121 Mission Specialist Piers Sellers signals okay after donning his launch and entry suit in preparation for the simulated countdown he and other crew members will undertake. The crew is taking part in Terminal Countdown Demonstration Test activities, including the dress rehearsal for launch. Mission STS-121 is scheduled to be launched July 1. Photo credit: NASA/Kim Shiflett
Location Kennedy Space Center, FL
Date June 15, 2006