Washington National Records Center

The Washington National Records Center (WNRC) in Suitland, Maryland, stores and references records of U.S. Federal agencies located in the District of Columbia, Maryland, Virginia and West Virginia. Physical records are transferred to WNRC when they are no longer needed by the respective agencies but have not met their scheduled retention period, including the records of the Federal Courts in DC and the Armed Forces.

Source: Wikipedia — Washington National Records Center (CC BY-SA 4.0)