Under the terms of the Treaty on Open Skies, a Russian Federation Air Force Tupolev Tu-154M (NATO reporting name "Careless") surveillance plane with United States Air Force personnel aboard as observers makes an unusual, but authorized, low-level reconnaissance flight over The Pentagon in Arlington, Virginia, the United States Capitol Building in Washington, Joint Base Andrews in Maryland, Central Intelligence Agency headquarters in Langley, Virginia, and other United States Government buildings and facilities in the Washington, D.C., area, as well as over the Trump National Golf Course in Sterling, Virginia, flying at about 3700 feet as it passes over downtown Washington and Joint Base Andrews.