STS-115 Mission Specialist Steve Maclean is installing a solar alpha rotary joint drive lock assembly multilayer installation cover.

In the Space Station Processing Facility at NASA's Kennedy Space Center, STS-115 Mission Specialist Steve Maclean is installing a solar alpha rotary joint drive lock assembly multilayer installation cover. He and other crew members are at the center for Crew Equipment Interface Test activities. Equipment familiarization is a routine part of astronaut training and launch preparations. The mission will deliver the second port truss segment, the P3/P4 Truss, to attach to the first port truss segment, the P1 Truss, as well as deploy solar array set 2A and 4A. Launch on Space Shuttle Atlantis is scheduled for late August. Photo credit: NASA/Kim Shiflett