The STS-121 crew sit for their traditional breakfast before suiting up for launch.

For the second morning in a row, the STS-121 crew sit for their traditional breakfast before suiting up for launch. Seated from left are Mission Specialists Piers Sellers and Michael Fossum, Pilot Mark Kelly, Commander Steven Lindsey, and Mission Specialists Lisa Nowak, Stephanie Wilson and Thomas Reiter, who represents the European Space Agency. The first launch attempt July 1 was scrubbed due to weather concerns and postponed 24 hours. The launch of Space Shuttle Discovery on mission STS-121 is the 115th shuttle flight and the 18th U.S. flight to the International Space Station. During the 12-day mission, the STS-121 crew will test new equipment and procedures to improve shuttle safety, as well as deliver supplies and make repairs to the International Space Station. Photo credit: NASA/Kim Shiflett