View of MS Mastracchio and FE Anderson during a session of STS-118 / Expedition 15 EVA

S118-E-08022 (15 Aug. 2007) --- Astronauts Clay Anderson (left), Expedition 15 flight engineer; and Rick Mastracchio, STS-118 mission specialist, participate in the mission's third planned session of extravehicular activity (EVA) as construction and maintenance continue on the International Space Station. During the 5-hour, 28-minute spacewalk, Mastracchio and Anderson relocated the S-Band Antenna Sub-Assembly from Port 6 (P6) to Port 1 (P1) truss, installed a new transponder on P1 and retrieved the P6 transponder. The blackness of space and Earth's horizon provide the backdrop for the scene.