Todd McInturf / The Detroit News

Retired U.S. Army Chief Warrant Officer Brent Gourley, 61, left, of Dothan, Ala., and retired U.S. Marine Col. Mike Holland, 61, right, of Fairburn, Ga., fly the Huey. Both flew Hueys in Vietnam, and Holland is a retired Northwest Airlines pilot who flew out of Detroit for 17 years.