The belly ball turrett looking toward the back of the plane. The yellow tank is the ball turret gunners oxygen supply. Both waist guns are visible in this picture.
In the bottom of the waist section (aft of the radio compartment) provision is made for a Sperry ball-type power turret equipped with twin .50-cal. machine guns. This turret can be entered from within the airplane after takeoff. The gunner's seat in the ball turret is made of armor plate.