CAPE CANAVERAL, Fla., Oct. 12 (UPI) --
Shuttle Atlantis astronauts David Wolf
and Piers Sellers
finished their second spacewalk of the mission on Saturday, a six-hour outing to install 25 devices to keep the station's ammonia cooling system from leaking. The spacewalkers also activated a small rail cart that will be used to haul equipment during future construction and maintenance jobs.
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