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

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

The National Transportation Safety Board will hold a briefing on its investigation into the crash between an American Airlines plane and a U.S. Army Blackhawk helicopter. You can watch live below ...

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

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

Plus: President Donald Trump orders preparations on a facility at the U.S. naval base at Guantanamo Bay to house up to 30,000 migrants.

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 ...

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

Investigators have recovered the black boxes from the American Airlines jet involved in a mid-air collision with a U.S. Army ...

Sixty-seven people are presumed dead after a passenger plane on approach to Reagan National Airport near Washington, DC, ...

It will be some time before investigators can offer clear answers to the cause of the midair crash at Ronald Reagan ...