An American Airlines regional jet went down in the Potomac River near Ronald Reagan Washington National Airport after colliding with a U.S. Army Black Hawk helicopter, Wednesday night, prompting a multi-agency search-and-rescue operation, according to officials.

Preliminary flight data from the deadly plane crash near Reagan National Airport in Washington, D.C., shows conflicting readings about the altitudes of a passenger jet and Army helicopter that collided,

An American Airlines plane with 64 people on board collided with an Army helicopter over Washington, D.C., and crashed into the Potomac River.