NASA Successfully Completes Repairs At International Space Station With Christmas Eve Spacewalk [Video]

Spacewalkers on Tuesday treated the International Space Station, or ISS, with a Christmas gift, a new ammonia-pump module that would fully restore the station's critical coolant system. Flight Engineers Mike Hopkins and Rick Mastracchio completed the mission of replacing a refrigerator-sized faulty coolant pump with a spare unit in two spacewalks conducted on Dec. 22 and Dec. 24. "Houston, you got yourself a new pump module, congratulations," one of the spacewalkers radioed to NASA's Mission Con...