NASA astronauts Rick Mastracchio and Mike Hopkins perform urgent repairs on the International Space Station. They went on a spacewalk Sunday. The astronauts have unhooked four fluid quick disconnects from the faulty ammonia pump module and they continue repairs, preparing to install a new unit.
NASA Spacewalk Livestream, Astronauts Perform Urgent Repairs: Watch Here
12/21/2013
Updated: 7/18/2015