Astronaut tinkers with space station equipment
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ISS astronauts brave week's third spacewalk

Two American astronauts have ventured out on a spacewalk for the third time in a week, to install cables on the International Space Station.

Terry Virts and Butch Wilmore had 400 more feet of power and data cable, as well as two antennas, to install.

The work is needed to prepare the station for new crew capsules, which will travel to the International Space Station in 2017.

Chris Eakin reports.

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