
Image above: The STS-121 crewmembers gather for an in-flight crew photo in the Destiny laboratory of the International Space Station. From the left (bottom) are astronauts Stephanie Wilson, mission specialist; Steve Lindsey, commander; and Lisa Nowak, mission specialist. From the left (top) are astronauts Piers Sellers, Mike Fossum, both mission specialists; and Mark Kelly, pilot. Credit: NASA
The crew of Space Shuttle Discovery tested new equipment and procedures that increase the safety of space shuttles during the STS-121 mission to the International Space Station. It also performed maintenance on the space station and delivered supplies, equipment and a new Expedition 13 crew member to the station.
This mission carried on analysis of safety improvements that debuted on the Return to Flight mission, STS-114, and built upon those tests.