After spending nearly 7 months in zero gravity, astronaut Sunita Williams overcame the challenge of re-learning to walk, then set a record with a 5.5-hour spacewalk. Along with Butch Willmore, Williams smashed Peggy Whitson's record for total spacewalk time at the International Space Station and conducted vital experiments on microbial survival in space.

NASA astronaut Sunita Williams has surpassed former astronaut Peggy Whitson’s total spacewalk time of 60 hours and 21 minutes. | World News | Patrika News

During a five-and-a-half hour spacewalk with her colleague Butch Wilmore, Sunita Williams surpassed former astronaut Peggy Whitson’s total spacewalking time of 60 hours and 21 minutes.