A Special Tactics team member in advanced skills training at the Special Tactics Training Squadron jumps into the Gulf to clean the Destin Marina during a training dive, Destin, Florida, May 8, 2019. ST Airmen are graduates of the Air Force Combat Dive Course which provides them with open and closed circuit diving procedures, navigational swim training, day and night tactical open water surface swims, and combat diving infiltration and exfiltration techniques. (U.S. Air Force photo by Senior Airman Rachel Yates)