Some of the crew practices getting into a slidewire basket on Launch Pad 39B while others watch.

Some of the STS-121 crew practices getting into a slidewire basket on Launch Pad 39B while others watch. In the basket are Mission Specialists Piers Sellers, Stephanie Wilson and Thomas Reiter. Behind them are Commander Steven Lindsey, Mission Specialists Lisa Nowak and Michael Fossum, and Pilot Mark Kelly. The crew is at Kennedy for Terminal Countdown Demonstration Test activities, including emergency egress training from the pad. They will also suit up in their orange flight suits for a simulated countdown to launch. Discovery is designated to launch July 1 on mission STS-121. It will carry supplies to the International Space Station. Photo credit: NASA/Kim Shiflett