Coast Guardsmen from Port Security Unit 309 waterside division aboard a 32-foot Transportable Port Security Boat for a anti-terrorism force protection mission patrol off the coast of Guantanamo Bay, Cuba, in support of Operation Freedom’s Sentinel, July 23, 2018. PSUs serve as anti-terrorism force protection expeditionary units with boat crews and shore-side security teams capable of supporting port and waterway security anywhere the military operates. U.S. Coast Guard photo by Petty Officer 1st Class Emaia Rise.