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From left, 2nd Lts. Colin Klopp, John Testerman and Ryan Douglas, assigned to 14th Student Squadron at Columbus Air Force Base, Mississippi, are members of the U.S. Air Force Academy’s a capella group, In the Stairwell. The group recently advanced to the semifinals of America’s Got Talent and will perform again on Sept. 12 at 7 p.m. CST. (U.S. Air Force photo by Staff Sgt. Christopher Gross)
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