The AC-130 is the world's biggest flying artillery gunship - nicknamed 'Hell in the Sky.' With three side-firing weapons, a 25mm gatling gun, a 40mm Bofors cannon, and a 105mm howitzer, it's easy to see why it got its name. 🎥Air Warriors | Smithsonian Channel Aviation Nation

The rotating-barreled, hand-cranked Gatling gun was invented in 1861, and it immediately rewrote the rules of warfare. Now, Weapon Hunter host Paul Shull puts one to the test and demonstrates its impressive firepower. 🎥The Weapon Hunter | Smithsonian Channel Aviation Nation