Navy Petty Officer 1st Class Miguel Arellano, an assistant watchman with Joint Task Force Guantanamo's Navy Expeditionary Guard Battalion, performs crunches on the abdominal machine at the G.J. Denich Gym, Sept. 8, 2009. The NEGB provides the main guard force inside the detention facilities. JTF Guantanamo conducts safe, humane, legal and transparent care and custody of detainees, including those convicted by military commission and those ordered released by a court. The JTF conducts intelligence collection, analysis and dissemination for the protection of detainees and personnel working in JTF Guantanamo facilities and in support of the War on Terrorism. JTF Guantanamo provides support to the Office of Military Commissions, to law enforcement and to war crimes investigations. The JTF conducts planning for and, on order, responds to Caribbean mass migration operations.