A library technician looks through boxes of books during book distribution within Joint Task Force Guantanamo's Camp 4, April 23. Books are sorted by topic for each detainee's reading preference. JTF Guantanamo conducts safe, humane, legal and transparent care and custody of detainees, including those convicted by military commission and those ordered released. 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 Global War on Terror. 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.