Space station crew conducts spacewalk

Two crew members ventured out of the international space station early Friday for a nearly six-hour spacewalk filled with maintenance tasks such as replacing a camera and fixing an oxygen system. "OK. We're going out," said Russian commander Pavel Vinogradov as he and US flight engineer Jeff Williams exited the Russian side of the station in their bulky suits while the outpost soared more than 220 miles (354 kilometers) above Earth. Vinogradov and Williams were scheduled, among other things, to reposition a cable, replace a camera and retrieve a thruster residue collection plate, a contamination monitoring device and biology experiments.