Astronauts complete 3rd and final spacewalk

(AP) -- Two astronauts who were teaching math and science to middle school students just five years ago went on a spacewalk together Monday, their path cleared of dangerous orbiting junk that had threatened the space station and shuttle. On Sunday, the linked shuttle-station complex had to move out of the way of a 4-inch piece of debris that had been projected to come perilously close during the spacewalk.

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<p><a href="http://www.physorg.com/news157032900.html">Astronauts complete 3rd and final spacewalk</a></p> <p>(AP) -- Two astronauts who were teaching math and science to middle school students just five years ago went on a spacewalk together Monday, their path cleared of dangerous orbiting junk that had threatened the space station and shuttle. On Sunday, the linked shuttle-station complex had to move out of the way of a 4-inch piece of debris that had been projected to come perilously close during the spacewalk.</p>