A pilot's theory about the cause of the crash between an American Airlines jet and a military helicopter has quickly gone viral online.

The US president says the army Black Hawk involved in Wednesday's collision was above the 200ft altitude limit for helicopters.

Wednesday night’s crash of an American Airlines commuter plane in Washington could be one of the worst disasters for the Fort Worth-based airline in more than two decades.

Late Wednesday evening, an American Airlines regional jet operated by PSA Airlines collided with a U.S Army helicopter and both crashed into the Potomac

There are no expected survivors after an American Airlines passenger jet and a U.S. Army Black Hawk helicopter collided in mid-air in D.C.

A massive search-and-rescue operation is underway after a passenger plane crashed with a military helicopter in Washington, D.C. Retired U.S. Air Force Brig. Gen. John Teichert breaks down what happened in the apparent collision footage. #PlaneCrash #DC

An American Airlines regional passenger jet and a US Army Black Hawk helicopter crashed into the Potomac River, near the Reagan Washington National Airport on Wednesday night, officials said. The aircraft was,

An American Airlines plane and a U.S. Army helicopter collided near Reagan National Airport and crashed into the Potomac River, according to officials.

Authorities shared a grim update on the collision involving an American Airlines passenger plane and a black hawk helicopter over Ronald Reagan International Airport in Washington, D.C.

An American Airlines jet collided midair with a military helicopter near Reagan National Airport. Four crew and 60 passengers were on board the plane.

The incident involved a PSA Airlines Bombardier CRJ700 regional jet and a Sikorsky H-60 helicopter, the FAA said

A massive recovery mission is underway near Washington, D.C., after an American Airlines flight collided with an Army helicopter.