A U.S. Marine and Airman perform scout swimmer training during Marine Special Operations School’s Individual Training Course, March 24, 2017, at Key West, Fla. For the first time, U.S. Air Force Special Tactics Airmen spent three months in Marine Special Operations Command’s Marine Raider training pipeline, representing efforts to build joint mindsets across special operations forces. (U.S. Air Force photo by Senior Airman Ryan Conroy)