Two astronauts went on a spacewalk Nov. 20, hoping to wire the International Space Station's newest room and keep the next shuttle visit on track for early December.
The two astronauts hooked up power, heater cables and fluid lines between the space station and the Harmony compartment that was delivered last month.
NASA cannot launch another space shuttle until Harmony is completely hooked up, inside and out, and space shuttle Atlantis is scheduled to liftoff Dec. 6.
A third and final spacewalk is scheduled for Nov. 24.
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