Members of the STS-121 crew pose with workers in the SPACEHAB facility during the Crew Equipment Interface Test.

Members of the STS-121 crew pose with workers in the SPACEHAB facility in Cape Canaveral during the Crew Equipment Interface Test. The astronauts (in blue suits) are Mission Specialists Piers Sellers and Michael Fossum, Pilot Mark Kelly and Commander Steven Lindsey. This test allows the astronauts to become familiar with equipment they will be using on their upcoming mission. STS-121 is scheduled to launch in July aboard Space Shuttle Discovery. Photo credit: NASA/Kim Shiflett