US Astronaut Suni Williams and Japanese astronaut Aki Hoshide made a spacewalk EVA (Extra Vehiclular Activity) to set up an alternative pathwway for ammonia coolant apparently leaking on a radiator on the P6 segrment of the International Space Station truss.  The astronauts re-routed this to an alternative radiator they had set up.  The spacewalk which lasted over six and a half hours began at 1228 GMT (hatch open) and ended at1907 GMT on 1 November,