Business Insider reviewed official briefings, flight data, and air traffic control audio tapes to piece together what ...

Audio from the American Airlines plane crash in Washington DC documents air traffic control's reaction to the collision.

It raises fresh questions as to why the two aircraft collided nearly head-on with each other killing all onboard.

Potomac River so far, after an American Airlines passenger plane collided with a US Army helicopter, in what's been described ...

An American Airlines plane carrying 60 passengers and four crew members collided with an Army Black Hawk helicopter outside ...

Air traffic controllers twice alerted the crew of a U.S. Army helicopter to the presence of an inbound American Airlines jet, with the first warning issued two minutes before the aircraft collided ...

A gasp can be heard on air traffic control audio as an American Airlines plane and a US Army helicopter collided in ...

The mid-air collision came just 24 hours after another passenger jet narrowly avoided hitting a helicopter when landing at ...

So far, over 40 bodies have been pulled from the Potomac River near Washington DC, and the search remains ongoing.

The audio indicates that air traffic controllers tried to warn the Army helicopter about a nearby Canadair Regional Jet.

An NTSB-led investigation is in full swing to identify factors that led to the Jan. 29 midair collision between an American ...