Avsnitt 6

The show tracks down the secret manual that explained how the Vietnamese defeated not only the US in the 20th century, but the Mongols 700 years earlier. It reveals the largest booby trap in history, one that snagged an entire battle fleet, how king Mithridates used a substance called burning mud in his revolt against Rome, and how the terrorist booby-traps and letter bombs of today were invented hundreds of years ago.