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It will be a few days before electrical systems are restored 250 miles up. And NASA still must contend with the tripped breaker from last weekend; another spacewalk ultimately may be needed. The trouble knocked out one of the eight power channels emanating from the solar wings, a problem that persisted after Wednesday’s spacewalk.

“One channel down is not a position you want to be in, but it doesn’t send you into really worrying and having to rush out the door,” Suffredini said.

Wednesday’s spacewalk, meanwhile, earned Williams a place in history. The Navy captain _ the lone woman on the crew _ is now the world’s most experienced female spacewalker with 44 hours spent out in the vacuum over six excursions.

The previous record-holder, Peggy Whitson, sent up congratulations: “You go, girl!”

Williams replied: “Anybody could be in these boots.”

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Online:

NASA: http://www.nasa.gov/mission_pages/station/main/index.html