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An infrared camera held by Matthew Damon reveals temperature differences of the stairwell at the Bangor home of Keith and Beth Bisson during an energy audit Friday. (BANGOR DAILY NEWS PHOTO BY BRIDGET BROWN)

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An infrared camera held by Matthew Damon reveals temperature differences of the stairwell at the Bangor home of Keith and Beth Bisson during an energy audit Friday, June 11, 2010. (Bangor Daily News/Bridget Brown)