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 are Mission Specialists Piers Sellers and Michael Fossum (back to camera). They are looking at the replacement trailing umbilical system reel assembly they will be installing on the International Space Station. Other crew members are Commander Steven Lindsey, Pilot Mark Kelly and Mission Specialists Lisa Nowak, Stephanie Wilson and Thomas Reiter. 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.