An Army Black Hawk helicopter collided with a regional jet near Ronald Reagan Washington National Airport on Wednesday evening, U.S. officials confirmed to ABC News.

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Aviation experts have warned for years about near collisions at airports around the US, citing air traffic control shortages and airspace congestion.

American Airlines CEO Robert Isom said the National Transportation Safety Board, which is investigating the deadly midair collision between an American passenger jet and a military helicopter, will be the lone authority on the cause and details of the crash.

Both the captain, Jonathan J. Campos, 34, and co-pilot, Sam Lilley, 28, had been flying for years, according to family and friends.

The plane went down in the Potomac River near Reagan National Airport. An American Airlines regional jet went down in the Potomac River near Washington, D.C.'s Ronald Reagan Washington National Airport after colliding with a U.S. Army Black Hawk helicopter on Wednesday night, with no survivors expected.

American Airlines CEO Robert Isom shared a letter to all employees sharing updates and resources following the deadly mid-air collision.

NEW ORLEANS (WVUE) - A decorated Army general from Louisiana knows firsthand what it’s like to fly in a Black Hawk helicopter over the area where a deadly mid-air collision occurred Wednesday evening (Jan. 29).

Approximately 67 people are presumed dead after an Army helicopter and American Airlines passenger jet collided near Reagan National Airport Wednesday night.

The airspace around Washington, D.C., is congested and complex — a combination aviation experts have long worried could lead to catastrophe.