US Intelligence Community: CIA, NSA, FBI and the Rest

The US Intelligence Community is not one agency. It is a federation of 18 organisations spread across the federal government, including the CIA, NSA, FBI and DIA. On intelligence matters they all answer to the Director of National Intelligence (DNI), a post created in 2004 after the September 11 attacks.

The 18 members at a glance

The ODNI publishes the official list. The sprawl is deliberate: each department kept its own service because it needs intelligence tailored to its mission, from diplomacy to nuclear energy policy.

Origins: from Pearl Harbor to 1947

Pearl Harbor exposed a familiar failure: warning signs existed but sat in separate services that did not share them. During the war William Donovan's Office of Strategic Services combined espionage and special operations, only to be disbanded in 1945. The National Security Act of 1947 created the CIA as a central civilian agency and set up the Cold War national security system.

The big technical agencies followed: the NSA in 1952 for signals intelligence, then in 1961 the DIA, which merged military analysis, and the NRO, which runs reconnaissance satellites and was not officially acknowledged until 1992.

CIA vs NSA vs FBI: what is the difference?

• CIA: human intelligence (HUMINT) abroad, all-source analysis and, when the President orders it, covert action. It has no police or internal security powers.
• NSA: signals intelligence (SIGINT) and protecting government systems. It sits within the Pentagon and shares a director with US Cyber Command.
• FBI: the federal law enforcement agency, which is also the lead agency for domestic counter-intelligence and counter-terrorism. It is the only one of the three that can make arrests.

Alongside them, the NGA analyses imagery and geospatial data (GEOINT) and the NRO builds and flies the satellites that collect it. State's INR is one of the smallest members but has a reputation for independent analysis: its doubts about Iraq's weapons programmes were recorded in the 2002 National Intelligence Estimate.

The ODNI and the post-9/11 reform

Until 2004 the CIA director was also nominally head of the whole community but had little real control over Pentagon agency budgets. The 9/11 Commission found that information had failed to flow between agencies. The Intelligence Reform and Terrorism Prevention Act of 2004 split the roles and created the DNI, who manages the budget, sets priorities and serves as the President's principal intelligence adviser.

The model is still debated. Supporters point to bodies such as the National Counterterrorism Center, which pools data from several agencies. Critics note that the DNI coordinates but does not directly command CIA or military agency staff, and argue that the reform added another bureaucratic layer.

Oversight

In the mid-1970s the Senate's Church Committee exposed abuses that included surveillance of American citizens and plots to assassinate foreign leaders. Its work produced the Senate (1976) and House (1977) intelligence committees and the 1978 Foreign Intelligence Surveillance Act, which requires a special court's approval for intelligence surveillance on US soil.

The debate returned in 2013, when Edward Snowden's disclosures about bulk collection of phone metadata by the NSA led to the USA FREEDOM Act of 2015.

What it costs

Funding is split between the National Intelligence Program, run by the DNI, and the Pentagon's Military Intelligence Program. Since 2007 the government has published the top-line figure for each, with no breakdown. In recent disclosed years the national programme has exceeded $70 billion a year; the split between agencies remains classified.

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