Washington - US astronauts Tom Marshburn and Chris Cassidy installed video cameras Monday on the International Space Station's new Japanese porch. The work was the main task of the nearly five-hour spacewalk that the astronauts wrapped up nearly one and a half hours ahead of schedule at 1627 GMT.
The two cameras will help astronauts and ground crews to dock an unmanned Japanese cargo craft to the station. It is to make its first delivery of supplies in September.
The astronauts also fixed insulation on a robotic arm, did electrical work and installed handrails outside the ISS. NASA chose to put off the planned deployment of a carrier to hold spare parts until a later spacewalk in another mission.
It was the fifth and final spacewalk of the space shuttle Endeavour's mission at the ISS. During the mission, an external porch was installed on Japan's Kibo laboratory and will be used to expose experiments to the extremities of space.
Endeavour is to undock from the ISS on Tuesday and land at Cape Canaveral, Florida on Friday.
