The Federal Aviation Administration (FAA) has issued ground stops for flights to multiple airports in the Washington, D.C., region due to an "environmental" incident at the Potomac Consolidated Terminal Radar Approach Control (TRACON) facility in Virginia. The ground stop affects Ronald Reagan Washington National, Washington Dulles International, Baltimore/Washington International Thurgood Marshall, and Charlottesville and Richmond airports. The temporary shutdown underscores the vulnerability of the airspace system to unexpected incidents.