U.S. Coast Guard Reserve Port Security Unit 307 Troopers practice deploying various signaling devices during a live-fire exercise at Guantanamo Bay, Cuba, Aug. 21, 2008. PSU 307 provides port and maritime security for the water around U.S. Naval Station Guantanamo Bay and Joint Task Force Guantanamo. JTF Guantanamo conducts safe and humane care and custody of detained enemy combatants. The JTF conducts interrogation operations to collect strategic intelligence in support of the global war on terror and supports law enforcement and war crimes investigations. JTF Guantanamo is committed to the safety and security of American service members and civilians working inside its detention facilities.