MacLean and Burbank performing second EVA spacewalk

S115-E-05784 (13 Sept. 2006) --- Astronauts Daniel C. Burbank (right) and Steven G. MacLean, representing the Canadian Space Agency, participate in the second of three scheduled space walks for the Space Shuttle Atlantis and International Space Station crewmembers as construction resumes on the orbital outpost. The two STS-115 mission specialists are translating along the side of one of the station's trusses.