Built in 1944, “Killer B” was restored back to airworthy in 1995. Flying today in RAF colors, the B-25 was made well known as being the plane of the Dolittle Raid. Designed for the US Army Air Corps before the WWII, the B-25s original design had shoulder-mounted wings and a crew of three in a narrow fuselage. It was then decided the new bomber needed a much larger payload doubling its original specifications. With the new design, USAAC ordered 140 aircraft right off the drawing board. There were at least six major variants of the Mitchell, from the initial B-25A and B-25B, with two power-operated two-gun turrets, to the autopilot-equipped B-25C, and the B-25H with 75mm cannon for use on anti-shipping missions. The British designated the B-25Bs as the Mitchell I, the B-25C and B-25Ds as the Mitchell II, and their B-25Js, with 12 heavy machine guns, as the Mitchell III. The US Navy and Marine Corps designated their hard-nosed B-25Js as the PBJ-1J. In the end, the B-25 became the most widely used American medium bomber of World War Two.