Expedition 24 Flight Engineers Doug Wheelock and Tracy Caldwell Dyson completed the first spacewalk to replace a failed ammonia pump module on the International Space Station. The 8 hour, 3 minute excursion fell short of removing the failed Pump Module due to a leak in the fourth of four ammonia line connectors. Also, NASA and ESA, the European Space Agency, have joined forces and resources to explore the Red Planet; ATHLETE the robotic rover has a stretch run; a revealing composite image of two galaxies that first collided more than 100 million years ago; NASA summer interns learn flight testing with a remote-controlled airplane; and two NASA anniversaries are celebrated August 12.
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