US FAA lifts ground stop at the three Washington-area airports - Reuters

<a href="https://news.google.com/rss/articles/CBMilwFBVV95cUxQZWE1Z0d2Um41cV9CZ3ByVVZ5RzgxU05mczJWcWJlVWZBMHp6dnkwcWt3ZmtwM2Z2MnZnV3pVV29POWVKcnVTNlBrcGw1d3hQYUlxVjloWnJfMXpjOFZfQ0dVby1GQUVjSjI4eGR3ZE8yQ0dtNmcySFFsb1VRaW9hZ1l5cUFaMWkzLVBpUHNoRG5PbXVjMS1Z?oc=5" target="_blank">US FAA lifts ground stop at the three Washington-area airports</a>&nbsp;&nbsp;<font color="#6f6f6f">Reuters</font>

On Friday evening, four major airports in the Washington, D.C., region halted all flights for over an hour due to a strong chemical odor affecting air traffic controllers. The FAA reported the source of the smell as the Potomac TRACON, a radar facility managing air traffic for the region. Approximately 25% to one-third of all departures were delayed. Flights resumed after 7 p.m. ET, but a ground stop preventing landings remained active for some time.