jhvh1: mircea_popescu: Schwerer Gustav - Wikipedia: <https://en.wikipedia.org/wiki/Schwerer_Gustav>; Schwerer Gustav 800mm 1942 - YouTube: <https://www.youtube.com/watch%3Fv%3DfyFKbLGGCVY>; Schwerer Gustav - Hitler's giant gun - How it worked and why it ...: <https://www.warhistoryonline.com/war-articles/schwerer-gustav-hitlers-giant-gun-worked-turned-disaster.html>