A strong chemical smell at an air traffic control center has led to significant disruptions at several major airports in the Washington D.C. and Baltimore area. The Federal Aviation Administration (FAA) issued ground stops, halting flights at airports including BWI-Marshall, Reagan National, and Dulles International, alongside Richmond International. The ground stop, which lasted approximately one hour, affected operations and led to passenger delays. The FAA is currently investigating the source of the odor. While the ground stops have been lifted, travelers are advised to check with airlines for potential lingering effects on flight schedules.