Discovery astronauts complete first spacewalk

Astronauts Piers Sellers and Mike Fossum re-entered the ISS after completing the first of three planned spacewalks.

Discovery shuttle astronauts Piers Sellers and Mike Fossum re-entered the International Space Station on Saturday after completing the first of three planned spacewalks.

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The duo slipped back inside the ISS's airlock chamber to start re-pressurization after a spacewalk that lasted seven hours and 30 minutes, an hour longer than expected.