View of Astronauts Steven G. MacLean top, Canadian Space Agency CSA, and Daniel C. Burbank bottom, STS-115 Mission Specialist MS wearing their Extravehicular Mobility Units EMU prepares the Solar Alpha Rotary Joint SARJ on the P3 - P4 Truss during second Extravehicular Activity EVA spacewalk. Operations include releasing spring clamps, removing SARJ covers, and removing SARJ Launch Restraints.