A U.S. Army Soldier from the 74th Engineer Dive Detachment prepares for a simulated contaminated water diving field training exercise at Joint Base Langley-Eustis, Virginia, Nov. 16, 2020. The U.S. Army recognizes that controlling inland waterways and ports is vitally important in the contemporary military environment and for this reason created engineer dive units during World War II. (U.S. Air Force photo by Senior Airman Anthony Nin Leclerec)