"Obviously, that will be fluid," John Potter, President and CEO of the Metropolitan Washington Airports Authority, said at a press conference early Thursday morning.Start the day smarter. Get all the news you need in your inbox each morning.

The American Airlines regional jet was on the final approach to Ronald Reagan National Airport in Washington, D.C., when it collided midair with a military Black Hawk helicopter shortly before 9 p.m.

Multiple fatalities have been reported after a horrific incident involving American Airlines flight 5342 and a U.S. Army UH-60 Black Hawk helicopter over