Today's battlefield is dominated by hugely reliable, hyper-lethal superweapons. Billions of dollars are spent on research and development, in a never-ending search for technological superiority. But how did these weapons evolve? Who are the men and women that gave birth to these inventions? Weaponology takes a high-tech future weapon and unlocks its family tree, tracing the roots of its existence. Season 2 tells the stories of the world's most specialized forces . . . including the U.S. Navy Seals, the U.S. Marine Corps, the Royal Marine Commandos, the Green Berets, and many more.