Space station astronauts to make second repair attempt

SPACE.com : Astronauts on the International Space Station are gearing up for a second attempt to repair its cooling system, which shut itself off on 31 July. Their first attempt last Saturday was cut short because of leaking ammonia coolant and a stuck hose. Astronauts Douglas Wheelock and Tracy Caldwell Dyson will make a second spacewalk tomorrow to disconnect some hoses and then a third spacewalk is planned for Sunday to replace the pump. Construction on the space station began in 1998 and is slated to be completed next year.