Astronauts Jeffrey N. Williams (left) 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 or STS-96). The two mission specialists also succeeded in securing 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.