Flights were grounded at three major DC-area airports on Friday night because of a "strong odor" emanating from an air traffic control center, officials said.
Chemical Smell at Control Center Halts Traffic at Washington and Baltimore Airports - The New York Times The New York TimesDC airports: Passengers face delays as FAA investigates chemical smell at air traffic control center CNN‘Strong Odor' at Air-Traffic Site Spurs Delays at D.C. Airports WSJFlights at Richmond International, other airports halted due to ‘strong odor' at radar facility WRIC ABC 8News