In the Orbiter Processing Facility, STS-115 crew members look over the cockpit on the orbiter Atlantis, the designated launch vehicle for their mission. From left are Mission Specialists Joseph Tanner, Daniel Burbank, Heidemarie Stefanyshyn-Piper and Steven MacLean, who represents the Canadian Space Agency. The crew is at the center for Crew Equipment Interface Test activities, which involves equipment familiarization, 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.