Chronicles of Courage: B-17 and the Ball Turret

At the height of World War II, Allied bombing missions often include hundreds of Boeing B-17 Flying Fortresses that strike deep behind enemy lines. Gunner Mason Howe survives these harrowing missions while operating one of the plane’s most innovative defenses: the ball turret gun. “Chronicles of Courage: Stories of Wartime and Innovation” is a co-production of Vulcan Productions and NBC News Learn.