MOSCOW (AP) - Two international space station crew members have begun a spacewalk.
The walk started more than a half-hour late because of concerns about high carbon dioxide levels in the crew members' redesigned Russian space suits.
High concentrations of the gas can cause dizziness, nausea and other problems. But both space walkers said they felt fine and ground controllers decided the readings presented no threat.
Commander Gennady Padalka, a veteran Russian cosmonaut, and Flight Engineer Mike Barratt, a U.S. astronaut on his first space mission, are scheduled to install an additional docking port for Russian space vehicles.
The pair also plan to install an antenna to aid docking, and take photos of a manually operated crane used during Russian spacewalks.
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