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In this still image taken from NASA TV, (Credit: Getty Images)

In this still image taken from NASA TV, International Space Station astronaut Tom Marshburn, left, is seen from the helmet-cam of Chris Cassidy as they stow a pump during repairs to the station. (May 11, 2013)

NASA astronauts plug leak during rare spacewalk

Astronauts making a rare, hastily planned spacewalk replaced a pump outside the International Space Station in hopes of plugging a serious ammonia leak.

In this still image taken from NASA TV,
(Credit: Getty Images)

In this still image taken from NASA TV, International Space Station, astronauts Chris Cassidy takes photos as he works on repairs to the station. (May 11, 2013)

International Space Station astronauts Chris Cassidy, left, and
(Credit: Getty Images)

International Space Station astronauts Chris Cassidy, left, and Tom Marshburn work on repairs to the station. (May 11, 2013)

In this image made from video provided by
(Credit: AP)

In this image made from video provided by NASA, astronaut Christopher Cassidy, foreground, holds a power wrench as he stows away a suspect coolant pump on the International Space Station. (May 11, 2013)

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International Space Station astronauts Chris Cassidy, bottom, removes
(Credit: Getty Images)

International Space Station astronauts Chris Cassidy, bottom, removes a pump from the station to work on repairs. (May 11, 2013)

In this still image taken from NASA TV,
(Credit: Getty Images)

In this still image taken from NASA TV, International Space Station astronaut Tom Marshburn, left, is seen from the helmet-cam of Chris Cassidy as they finish work on repairs to the station. (May 11, 2013)

In this still image taken from NASA TV,
(Credit: Getty Images)

In this still image taken from NASA TV, International Space Station astronauts Chris Cassidy, top, and Tom Marshburn finish work on repairs to the station. (May 11, 2013)

U.S. astronauts and flight engineers Chris Cassidy and
(Credit: EPA)

U.S. astronauts and flight engineers Chris Cassidy and Tom Marshburn during a spacewalk at the International Space Station. (May 11, 2013)

In this still image taken from NASA TV,
(Credit: Getty Images)

In this still image taken from NASA TV, International Space Station astronaut Tom Marshburn, left, is seen from the helmet-cam of Chris Cassidy as they stow a pump during repairs to the station. (May 11, 2013)

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ADVERTISE HERE

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