Despite an eight-hour spacewalk on Saturday, two astronauts failed to remove a broken pump at the International Space Station.
NASA astronauts Doug Wheelock and Tracy Caldwell Dyson were trying to replace a failed ammonia pump module that took down half the station's cooling system. As a result, the six-person crew aboard the ISS has had to turn off all unnecessary equipment and halt science experiments.
NASA has said the three Russian cosmonauts and three NASA astronauts aboard the station are not at any risk.
A second spacewalk to connect the fluid ammonia lines of the broken pump is planned for Wednesday.