ISS013-E-80781 (12 Sept. 2006) --- Canadian Space Agency astronaut Steven G. MacLean, STS-115 mission specialist, and astronaut Christopher J. Ferguson, pilot, work inside the Destiny laboratory to support the first day of the resumption of construction on the International Space Station. Two crewmates--astronauts Heidemarie M. Stefanyshyn-Piper and Joseph R. Tanner--earlier donned extravehicular mobility units and were outside now participating in the first of three scheduled space walks.