NASA Administrator Charles Bolden, left, welcomes home STS-127 Astronauts Dave Wolf, and Christopher Cassidy, right, shortly after the space shuttle Endeavour and its crew landed, Friday, July 31, 2009 at NASA's Kennedy Space Center in Cape Canaveral, Fla., completing a 16-day journey of more than 6.5 million miles. Endeavour delivered the final segment to the Japan Aerospace Exploration Agency's Kibo laboratory and a new crew member to the International Space Station.