The Classic U.S. Combat Aircraft of WWII programs tell the story, through a series of classic war planes, of the development of the combat aircraft of the Second World War. Each machine was produced to meet a specific requirement, usually to meet or beat the capabilities of an existing enemy or a potential aggressor. Serving throughout all the different theaters of war as the long-range component for the bomber escort missions, the P-51 Mustang became arguably the finest single-engine fighter aircraft series of WWII.