The U.S. Army helicopter involved in the midair collision over Ronald Reagan National Airport in January was flying higher than it was supposed to be when it crashed into an American Airlines flight that was about to land at the airport,

Three days of investigative hearings on the deadly midair collision between a military helicopter and passenger plane over Washington begin Wednesday morning and may reveal new insights into the crash

Investigators have found that a helicopter involved in a deadly crash with a passenger plane over Washington was flying above its height limit.