Space shuttle Endeavour's STS-127 mission crew members greet the media after arriving at NASA's Kennedy Space Center in Florida. Seen here is Commander Mark Polansky, who explained they were at Kennedy for the Terminal Countdown Demonstration Test, or TCDT. The astronauts will be taking part in Terminal Countdown Demonstration Test activities that include equipment familiarization and emergency egress training, and culminates in a simulated launch countdown aboard Endeavour. The STS-127 mission is the final of three flights dedicated to the assembly of the Japanese Kibo laboratory complex. Launch is targeted for June 13. Photo credit: NASA/Kim Shiflett