Central Intelligence Agency
Defense Intelligence Agency
Federal Bureau of Investigation
National Security Agency
National Geospatial-Intelligence Agency (formerly NIMA)
National Reconaissance Office
Those are the six biggies. Wikipedia (scroll to bottom) also includes:
Air Force Intelligence
Army Intelligence
Navy Intelligence
Marine Corps Intelligence
Coast Guard Intelligence
Information Analysis and Infrastructure Protection Directorate
Department of Energy: Office of Intelligence
Department of State: Bureau of Intelligence and Research
Department of the Treasury: Office of Intelligence Support
Or you could link over to FAS, which lists about thirty or forty different organizations with ties to “intelligence.” Whether they count as part of the 15 sounds like an accounting matter to me.
It is accurate to say that he supervises them all, but he does not run them all. The National Security Act of 1947 established the Director of Central Intelligence as the titular head of the intelligence community, as well as the head of the CIA, as well as the President’s chief intelligence advisor.
Yes and no. The most expensive intelligence programs – NSA, NGIA, and NRO – are located in DOD, under the SecDef. The SecDef also runs tactical intelligence programs (ie, that have to do with battlefield intelligence, like the enemy is over there, so let’s maneuver our battalion over this way), which are closely linked with the intelligence services of the Departments of the Army, Navy, and Air Force.