In 1962, Joseph Williams and Clifford Bradley proposed a project for a vehicle featuring an unusual fighting compartment configuration. The vehicle was designated AAT60. Its gun was mounted in a small inhabited turret, while the crew was located below. The Commander was located rather high up, right behind the gun. The design allowed the size of the vehicle's front to be decreased, making it comparable to vehicles with uninhabited turrets. Even though the AAT60 project existed only in blueprints, some design solutions were adopted for the M60A2 American tank.