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

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

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

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

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

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

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

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

More from the final moments of the doomed aircraft has emerged in a series of recordings from Air Traffic Control.

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

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

Upon first approach, Republic Airways Flight 4514 diverts from course, circles around, and lands during a second attempt at ...