The Army had Joe DiMaggio and Pat Tillman, among others. The Navy: Roger Staubach, David Robinson, Bob Feller, and Yogi Berra, to name a few. Ted Williams served in the Marines. But the Air Force? Its top athletes apparently have been NFL players Chad Hennings and Bryce Fisher, who aren’t exactly household names. 2nd Lt. Greg Flynn, a 2009 Air Force Academy grad, is making a bid to change that. Flynn, an All-American hockey player last year, is pulling double duty as a contract manager at Hanscom Air Force Base, Mass., and a rookie defenseman for the Lowell Devils of…