A North American B-25 Mitchell "N6578D", flown by pilots John "Jeff" Hawke and Duane Egli, was the primary filming platform for the aerial sequences. It was fitted with camera positions in what were formerly the aircraft's nose, tail and waist gun positions. An additional camera, on an articulating arm, was mounted in the aircraft's bomb bay and allowed 360-degree shots from below the aircraft. The top gun turret was replaced with a clear dome for the aerial director, who would co-ordinate the other aircraft by radio.