KENNEDY SPACE CENTER, FLA. - In the Orbiter Processing Facility, the STS-121 crew receives a briefing and up-close look beneath Space Shuttle Atlantis at the handheld cameras they will carry into space. From left, in the blue flight suits, are Mission Specialists Stephanie D. Wilson and Michael E. Fossum, Pilot Mark E. Kelly and Commander Steven W. Lindsey. The astronauts of the second Return to Flight mission, STS-121, are at Kennedy Space Center to participate in the Crew Equipment Interface Test (CEIT). 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 in July.