Every single exit/entrance on a Fed building in DC is user video surveillance all the time. If it ism't it is deliberate or neglect. Friend from HS worked at Dept of Ag HQ on the Mall. Inspot him in yje mass of humanity leaving the 80's, when I visited him, took the Metro in . Came out at the Mall station right outside his building. Asked what his office # was so I could meet him right when he quit. Said no way.No visitors without official business.Had to stand at the top of the station entrance 5 PM and pick him out of the mass of humanity.