The Army helicopter and regional American Airlines jet that collided over Washington are both workhorse aircraft that operate around the world on a daily basis. What to know about the aircraft:

Get all the news you need in your inbox each morning. Federal aviation investigators vowed earlier in the day that they will find the cause of a horrific collision. NTSB Chairwoman Jennifer Homendy said at a briefing that the agency wants to assure the American public it will "leave no stone unturned in this investigation .

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

The American Airlines flight was carrying 64 people when it collided with a Black Hawk helicopter near Reagan National Airport.

The Army helicopter and regional American Airlines jet that collided over Washington are both workhorse aircraft that operate around the world on a daily basis.

The American Airlines flight was carrying 64 people when it collided with a Black Hawk helicopter near Reagan National Airport.

The American Airlines flight was carrying 64 people when it collided with a Black Hawk helicopter near Reagan National Airport.

A massive search operation is underway after a passenger aircraft carrying 64 people collided midair with a US Army Black Hawk helicopter near Reagan National Airport outside of Washington, DC, according to aviation and defense officials.

The Army helicopter and regional American Airlines jet that collided over Washington are both workhorse aircraft that operate around the world on a daily basis. There were 60 passengers and four crew members on the jet,

American Airlines Flight 5342 from Wichita, Kansas, was attempting to land when the plane and a Black Hawk helicopter collided.

Officials this morning say there are no survivors after a plane crash in Washington. The plane involved has ties to Ohio. What we know.