![](https://www.historynet.com/wp-content/uploads/2022/02/Vietnam-PBR-riverine-patrol-boat.jpg)
A patrol boat sailor fires twin machine guns into the shoreline along the Mekong Delta southwest of Saigon in February 1969. Viet Cong fighters often lurked concealed in the Delta’s canals. The PBR’s speed and maneuverability enabled its crews to strike quickly and zip in and out of harm’s way. (AP)
AP