Astronauts Embark on Spacewalk
By VOA News
20 July 2009
Astronauts aboard the International Space Station are on a spacewalk, the second of five scheduled during the shuttle Endeavour's 11-day mission at the station.
The 6.5- hour spacewalk with Dave Wolf and Tom Marshburn is to conduct maintenance work at the station. The walk coincides with the 40th anniversary of man's landing on the moon.
Wolf and astronaut Tim Kopra completed the first spacewalk of the mission during a 5.5-hour operation Saturday. They worked to install an external platform on a massive Japanese lab at the space station.
The platform will allow scientists to conduct experiments in the vacuum of space.
With the shuttle crew's visit, there are 13 astronauts aboard the space station, the most ever. Kopra is taking the place of Japan's Koichi Wakata, who has been on the space station since March.
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