NASA officials preview the upcoming spacewalk to fix a failed valve that regulates the coolant system on the International Space Station. Nathan Frandino reports. - REUTERS

NASA Preps For Spacewalks To Fix Failed Valve On ISS

NASA officials preview the upcoming spacewalk to fix a failed valve that regulates the coolant system on the International Space Station. Nathan Frandino reports. - REUTERS

Published: 19 Dec 2013