MacLean works at the Robotic Arm in the U.S. Laboratory during STS-115 EVA

S115-E-E-05528 (12 Sept. 2006) --- Astronaut Steven G. MacLean, representing the Canadian Space Agency, works at the controls for the Canadarm2 or space station remote manipulator arm as part of the team effort to successfully complete "installation day" on the International Space Station. The Atlantis and Expedition 13 crews worked on attaching the P3/P4 truss during the first of three scheduled spacewalks by STS-115 shuttle crew members. Today's space walkers were astronauts Joseph R. Tanner and Heidemarie M. Stefanyshyn-Piper.