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 CAPE CANAVERAL, Fla. (AP) - The astronauts aboard the linked shuttle and space station rested up Wednesday for the fourth spacewalk of their mission, a caulking gun and goo test.
"Three down, two to go," Mission Control told the astronauts in a wake-up message.
Two of the crew members will float outside Thursday night to squirt salmon-colored goo into the crevices of extra space shuttle thermal tiles that were deliberately damaged for the test. NASA wants to see how well the caulking gun and patching material work, in case they're ever needed for a real repair.
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