After the Central Intelligence Agency lost its role as the coordinator of the entire Intelligence Community (IC), special coordinating structures were created by each president to fit his administrative style and the perceived level of threat from terrorists during his term. The US has a different counter-terrorist structure than many of its close allies such as Australia, Canada, France, and the United Kingdom. Each has a structure that fits its particular legal system and culture. A contentious issue is whether there needs to be a domestic intelligence service separate from the FBI, which has had difficulty in breaking away from its law enforcement roots and cooperating with other intelligence services. The National Counterterrorism Center (NCTC) is no longer in the CIA proper, but is in the Office of the Director of National Intelligence (ODNI). NCTC, however, contains personnel from the CIA, FBI, Department of Justice, and from other members of the IC. A counterterrorism center did exist in the CIA before the NCTC was established. Given the restrictions of the National Security Act of 1947, which created the CIA but strictly forbade it from having any domestic police authority, the role of the CIA still has multiple dimensions. The National Clandestine Service (NCS) of the CIA can infiltrate or otherwise gain human intelligence (HUMINT) from terrorist organizations, their supporters, or from friendly foreign intelligence services. The NCS has a covert operations capability that, possibly in combination with military units from the United States Special Operations Command (USSOCOM), may take direct military action against terrorist groups outside the United States. The key CIA counter-terror partner is the FBI, which has the domestic operational responsibility for counter-terrorism, which includes both domestic intelligence collection and domestic police work. In the highly decentralized police system of the United States, the FBI also provides liaison and operates cooperatively with state and local police agencies, as well as with relevant federal units, e.g., the United States Coast Guard, which has an important role in preventing terrorist infiltration by sea. Military units have a specialized Counterintelligence Force Protection Source Operations capability to protect their personnel and operations. (en)