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Eco-photos of the week: Aug. 14-20

Stephen Colbert of The Colbert Report holds an explosive bolt given to him by the astronaut crew of STS-135 space shuttle mission during their appearance on the Aug. 16 show in New York City.

Photo: Paul E. Alers/NASA

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A cosmic gift for Colbert

Stephen Colbert of "The Colbert Report" holds one of the bolts that held the space shuttle on the launchpad — a gift from the crew of the final space shuttle mission during the team's appearance on Aug. 16 show in New York City.