🚨#BREAKING: A significant emergency response is underway, and a mass casualty has been declared after an American Airlines jet collided with a D.C. Police helicopter in a possible midair collision. 📌#Washington | #DC Currently, a significant emergency response is underway in Washington, D.C., as a mass casualty incident has been declared following reports that an American Airlines jet collided with a helicopter in a possible midair collision while landing at Reagan National Airport. Reports indicate that there were 60 people on board the commercial jet that struck the helicopter. One body has been recovered from a rescue boat, though the victims' identities remain unclear. The type of aircraft and the exact number of people on board have not yet been confirmed. Authorities have issued a ground stop for Reagan National Airport, and air traffic is being impacted by the crash in the Potomac River. Emergency teams are on the scene, working to secure the area and recover additional victims