Second EVA Completed to Replace Pump on ISS

Expedition 24 Flight Engineers Doug Wheelock and Tracy Caldwell Dyson completed the second spacewalk to replace a failed ammonia pump module on the International Space Station. The duo successfully detached and removed the failed unit from the station's cooling system. The two spacewalkers will put the new pump in place and connect it to the loop's fluid lines during a third EVA scheduled for this Monday.