Endeavour astronauts begin 3rd spacewalk

Crew aboard US space shuttle Endeavour have begun their third of four spacewalks at the International Space Station. CCTV News now brings you live pictures from the space station.

Today's walk involves astronauts Mike Finke and Andrew Feustal. Their task involves replacing the overnight airlock campout. The pair will first complete work on an external wireless antenna system that was left unfinished from last mission.

The remainder of the spacewalk will be used to stabilize power supplies to the Russian side of the space station. The astronauts also aim to extend the reach of the space station's robotic arm by adding a grapple fixture to the exterior of the Russian Zarya control module.

This will allow the robotic arm to reach the Russian segment, using the grapple fixture as a base. Feustel and Fincke were both involved in the mission's second spacewalk on Sunday, but the pair encountered problems with loose bolts and washers.

Endeavour's current mission is its 25th and final flight before it is retired along with the rest of NASA's fleet later this year.

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