Joseph Acaba Lee Archambault and Richard Arnold familiarize with hardware slated to fly on their space shuttle mission.

In the Space Station Processing Facility at NASA's Kennedy Space Center, from left, STS-119 Mission Specialist Joseph Acaba, Commander Lee Archambault and Mission Specialist Richard Arnold familiarize themselves with hardware slated to fly on their upcoming space shuttle mission. On the STS-119 mission, space shuttle Discovery will carry the S6 truss segment to complete the 361-foot-long backbone of the International Space Station. The truss includes the fourth pair of solar array wings and electronics that convert sunlight to power for the orbiting laboratory. Launch is targeted for Feb. 12, 2009. Photo credit: NASA/Kim Shiflett