Among the numerous variations of the M113 armored personnel carrier was the M132, known to its crews as the “Zippo” (after the cigarette lighter). The crew consisted of a driver and an operator for a rotating M10-8 flamethrower and M10 fuel and pressure unit, capable of shooting flames from four 50-gallon tanks to a range of 200 yards for 32 seconds before needing to refuel. Handfuls of them were usually assigned to headquarters units for use as needed, like these M132s of 1st Battalion, 4th Cavalry Regiment, attached to the 1st Infantry Division. ( Dick Swanson/The Life Images Collection/Getty Images)