U.S. Army Soldiers attend the 1st Special Warfare Training Group at the U.S. Army John F. Kennedy Special Warfare Center and School, Special Forces Combat Diver Qualification Course to train in amphibious infiltration, June 7, 2018, at Key West Fla. Green Beret Combat Divers are assigned to U.S. Army Special Forces Operational Detachment - Alphas that specialize in maritime operations. (U.S. Army photo)