In the Space Station Processing Facility at NASA Kennedy Space Center take part in the crew equipment interface test.

In the Space Station Processing Facility at NASA Kennedy Space Center, members of the STS-121 crew take part in the crew equipment interface test (CEIT). Seen here with Vehicle Integration Test officer Betsy Ahearn (center) are (from left) Mission Specialist Michael Fossum, Pilot Mark Kelly, Commander Steven Lindsey and Mission Specialist Piers Sellers. Other crew members not seen are Mission Specialists Lisa Nowak and Stephanie Wilson. The CEIT provides hands-on experiences with equipment used on-orbit. Mission STS-121 is the second in the Return to Flight sequence and will carry on improvements that debuted during last year's STS-114 mission and build upon those tests. Launch is scheduled in May. Photo credit: NASA/Kim Shiflett