And you thought those James Bond gadgets were only in movies. The real tools of a spy’s trade are just as incredible: cameras built into bras, deadly umbrellas, razor sharp knives hidden in shoe heels ...

Marines operating an M2 Browning machine gun mounted on a tripod at Khe Sanh Combat Base, Vietnam. (Bettmann Archive/Getty Images) For over a century the M2 Browning .50-caliber machine gun, known ...