NELLIS AIR FORCE BASE, Nev.-- Obi, Christopher Sellman’s guide dog, stops for a moment to check his surroundings. After losing his sight due to a number of medical emergencies, Mr. Sellman received Obi from Guide Dogs of America, one of the many Combined Federal Campaign charities people can contribute to during this year’s campaign. (U.S. Air Force photo by Senior Airman Michael Charles)
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