The precipitation to Earth of radioactive particulate matter from a nuclear cloud; also applied to the particulate matter itself. (Source: DOD)

Federal Bureau of Investigation.

Federal Communications Commission (United States).

See: Federal Communications Commission (FCC).

Federal Deposit Insurance Corporation (United States).

See: Federal Deposit Insurance Corporation (FDIC).

Fire Department of New York.

The U.S. Federal Communications Commission (FCC).

The U.S. Federal Deposit Insurance Corporation (FDIC).

The U.S. Federal Emergency Management Agency (FEMA).

The U.S. Federal Trade Commission (FTC).

The U.S. Federal Witness Security Program.

See: Federal Emergency Management Agency (FEMA).

Florida Flight Training Center.

Foreign Intelligence Surveillance Act.

Foreign Intelligence Surveillance Court.

Freedom of Information Act.

Foreign Terrorist Organizations (FTO) are groups operating outside the United States that plan and conduct acts of terrorism on both domestic and foreign targets. FTO's are designated by the U.S. Secretary of State.

See: Federal Trade Commission (FTC).

Foreign Terrorist Organization.

See: Foreign Terrorist Organization (FTO).