Lindsey will command STS-121. Credit: NASA

Veteran astronaut Steven W. Lindsey (Col., USAF) is the commander of STS-121. Mark E. Kelly (Cmdr., USN) is the pilot; Carlos I. Noriega (Lt. Col., USMC, Ret.) and Michael E. Fossum are the mission specialists. Other crewmembers will be named later.

STS-121 was added to the flight schedule to help accommodate the growing list of requirements originally assigned to the Return to Flight mission. The crew will re-supply the International Space Station with equipment and consumables. They will also continue the testing and development of new hardware and procedures designed to make Space Shuttle flight safer.

The crew recently began their pre-mission training together at NASA's Johnson Space Center, Houston. Initial activities focus on general procedural training on Shuttle and Station systems, preliminary spacewalk development and robotics training.

dsey is a three-time Shuttle astronaut, including commanding the STS-104 mission in 2001. Kelly has flown in space once, and Noriega twice. Fossum is making his first trip.