S2 E5 | Bizarre Weapons

Desperation breeds invention - and not all of it conventional. From a British scheme to launch airborne balloons against Nazi Germany, to American bats fitted with incendiary devices, to a covert effort to manipulate monsoon rains in Vietnam, newly unearthed documents reveal how far nations were willing to bend reality to their will. In the risky calculus of war, nothing is too strange to try.