B-25 Miss Hap at 75th Doolittle Raid Anniversary Miss Hap was taking off from Grimes Field headed to the Air Force Museum Airfield to attend the 75th Anniversary of the Doolittle Raid. Miss Hap is the oldest surviving B-25; the 4th off the North American production line in 1940. Visit the American AirPower Museum site to learn more about Miss Hap.
