KENNEDY SPACE CENTER, FLA. - During Crew Equipment Interface Test (CEIT) in the Orbiter Processing Facility at NASA’s Kennedy Space Center, STS-121 crew members take a close look at equipment in the payload bay of Atlantis. The Airlock is in the center. During CEIT, the crew has an opportunity to get a hands-on look at the orbiter and equipment they will be working with on their mission. Mission STS-121 is scheduled to launch aboard Space Shuttle Atlantis in July.