Astronaut James S. Voss, mission specialist, tunnels into the airlock of the Space Shuttle Atlantis following the 6-hour, 44-minute extravehicular activity (EVA) he shared with another astronaut to work on the exterior of the International Space Station (ISS). Astronauts Voss and Jeffrey N. Williams secured a United States-built crane that was installed on the station last year; installed the final parts of a Russian-built crane on the station; replaced a faulty antenna for one of the station's communications systems; and installed several handrails and a camera cable on the station's exterior.