On March 13, 2026, several airports in the Washington, D.C. area experienced significant disruptions due to a strong chemical odor reported at the Potomac Terminal Radar Approach Control (TRACON) facility in Warrenton, Virginia. This issue caused the Federal Aviation Administration (FAA) to issue a ground stop at major airports including Ronald Reagan Washington National Airport (DCA), Washington Dulles International Airport (IAD), and Baltimore-Washington International Airport (BWI). The original response to the odor involved investigations by FAA personnel and local firefighters. Through these investigations, it was determined that the smell was caused by an overheated circuit board, a problem that was subsequently resolved when the circuit board was replaced. As a result of the actions taken, air traffic controllers returned to their duties, and flights gradually resumed operations. However, the incident led to decreased morale and heavy delays for passengers, with some experiencing waits of up to three hours before being able to depart. Airlines made announcements to remediate the situation and advised passengers to check flight statuses for updates due to the backlogged operations lingering from the disruption. Emergency services verified that there was no danger to the air traffic controllers involved, ensuring the safety of all personnel in the vicinity. With operations slowly returning to normal and ground delays expected to continue for a while, the situation has garnered attention from public officials, with some expressing gratitude to first responders and a call for more awareness regarding air traffic safety measures. Overall, the prompt response to this issue illustrated the challenges faced in maintaining air travel operations during unexpected disruptions, particularly in regions with high air traffic demand.