Nearly 50 NTSB investigators will be searching the Potomac River for evidence to piece together what led to Wednesday night's deadly midair collision between an American Airlines regional jet and an Army Black Hawk helicopter.

The crew of the Army Black Hawk helicopter involved in the deadly collision with a jetliner had thousands of hours of flight experience.

In the immediate aftermath of the crash of American Airlines Flight 5342 , which was a service from Wichita (ICT) to Washington National (DCA) with 60 passengers and four crew members onboard, grainy CCTV footage of the incident emerged.

A regional jet carrying 64 people collided with an Army Black Hawk helicopter. Reagan National Airport grounded all flights.

Here are 10 key things to know about the Black Hawk helicopter involved in the incident, its capabilities, and the mission it was conducting at the time of the crash.

The helicopter involved in the fatal midair collision on Wednesday night may have flown off its approved path, The New York Times reports.

Rescue crews will return to the Potomac River on Friday morning as they continue searching for victims of Wednesday night’s deadly midair collision.

Officials: Likely no survivors from plane, Army helicopter crash in D.C. A passenger jet and a Black Hawk helicopter collided in midair Wednesday night and crashed into the Potomac River near Reagan National Airport near Washington,

A retired Army helicopter pilot shared insights into what may have caused Wednesday’s deadly mid-air collision over the Potomac River in Washington, DC.

Transgender pilot Jo Ellis is rumored to have been involved in the American Airlines flight and Black Hawk collision.

A former Black Hawk helicopter operator has suggested the U.S. military install collision avoidance systems into military aircrafts. On Wednesday