Astronauts Jeffrey N. Williams (bottom) and James S. Voss work with the newly delivered main boom of the Russian crane (Strela). The two were later successful in attaching the boom to its operator post (which had been delivered earlier by mission 2A-1). The two mission specialists also secured a U.S.-built crane that was installed on the station last year; 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.