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  2. List of U.S. security clearance terms - Wikipedia

    en.wikipedia.org/wiki/List_of_U.S._security...

    Within the U.S. government, security clearance levels serve as a mechanism to ascertain which individuals are authorized to access sensitive or classified information. These levels often appear in employment postings for Defense related jobs and other jobs involving substantial amounts of responsibility, such as air traffic control or nuclear ...

  3. Classified information in the United States - Wikipedia

    en.wikipedia.org/wiki/Classified_information_in...

    Classified information in the United States. The United States government classification system is established under Executive Order 13526, the latest in a long series of executive orders on the topic of classified information beginning in 1951. [1] Issued by President Barack Obama in 2009, Executive Order 13526 replaced earlier executive ...

  4. Classified information - Wikipedia

    en.wikipedia.org/wiki/Classified_information

    the object of a covert investigation, or a covert collection of information or intelligence. the identity of any person who is under covert surveillance. encryption and cryptographic systems. information or intelligence to, or received from, a foreign entity or terrorist group.

  5. Special access program - Wikipedia

    en.wikipedia.org/wiki/Special_access_program

    Special access programs (SAPs) in the U.S. Federal Government are security protocols that provide highly classified information with safeguards and access restrictions that exceed those for regular (collateral) classified information. SAPs can range from black projects to routine but especially-sensitive operations, such as COMSEC maintenance ...

  6. Federal government of the United States - Wikipedia

    en.wikipedia.org/wiki/Federal_Government_of_the...

    e. The federal government of the United States (U.S. federal government or U.S. government) [a] is the common government of the United States, a federal republic located primarily in North America, comprising 50 states, five major self-governing territories, several island possessions, and the federal district (national capital) of Washington ...

  7. United States Department of Homeland Security - Wikipedia

    en.wikipedia.org/wiki/United_States_Department...

    Its stated missions involve anti-terrorism, border security, immigration and customs, cyber security, and disaster prevention and management. [3] It began operations on March 1, 2003, after being formed as a result of the Homeland Security Act of 2002, enacted in response to the September 11 attacks. With more than 240,000 employees, [1] DHS is ...

  8. Central Intelligence Agency - Wikipedia

    en.wikipedia.org/wiki/Central_Intelligence_Agency

    The Central Intelligence Agency (CIA / ˌ s iː. aɪ ˈ eɪ /), known informally as the Agency, [6] metonymously as Langley [7] and historically as the Company, [8] is a civilian foreign intelligence service of the federal government of the United States tasked with gathering, processing, and analyzing national security information from around the world, primarily through the use of human ...

  9. List of federal agencies in the United States - Wikipedia

    en.wikipedia.org/wiki/List_of_federal_agencies...

    [1] [2] While the Administrative Procedure Act definition of "agency" applies to most executive branch agencies, Congress may define an agency however it chooses in enabling legislation, and through subsequent litigation often involving the Freedom of Information Act and the Government in the Sunshine Act. These further cloud attempts to ...