Science After 7-1/2-hour installation, space station cooling pump passes tests

Astronauts earn Christmas off after installing the cooling pump with their second spacewalk. Mission controllers hope to have the station running at full capacity by week's end.

By , Staff writer

NASA/REUTERS

Astronauts aboard the International Space Station successfully installed a new external cooling pump Tuesday during the second of two emergency spacewalks aimed at bringing the station's cooling system back to full capacity.