Two astronauts aboard the International Space Station (ISS) have completed a spacewalk to install a new camera system on the orbiting laboratory's robotic arm. They replaced a blown fuse and installed a new high definition camera on the starboard truss of the station.<br/><br/>In a blog post, the NASA scientists wrote on Friday that the spacewalk lasted for six hours and 49 minutes. Space station crew members have conducted 205 spacewalks in support of assembly and maintenance of the orbiting laboratory. Spacewalkers have now spent a total of 53 days, 6 hours and 25 minutes working outside the station.<br/>