100K views · 2K reactions | Pictured: The waist blister turret of prototype bomber XB-17, which was not adopted in the final design of the B-17 Flying Fortress bomber. Armed to the teeth, journalists remarked that it looked like a "Flying Fortress." | Dark Documentaries | Facebook

5.5K reactions · 520 shares | From the founder of the Discovery Channel, CuriosityStream is the world's first streaming service dedicated to streaming factual documentaries about science, tech, nature and more!  Start your free trial today.  | Curiosity Stream | Facebook