Nightly News   |  September 05, 2012

Women’s spacewalk record broken

There were some very tense moments on the International Space Station as astronauts tried on their second space walk in a week, to restore a critical power system. For more than five hours they struggled until finally, they got it working. In the process, an American set a new record as the most experienced female spacewalker ever. NBC's Tom Costello reports.

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