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

The head of the National Air Traffic Controllers Association says controllers around the country are devastated by the crash.

The Federal Aviation Administration (FAA) has indefinitely closed helicopter routes near Reagan National Airport following ...

Air traffic control audio shortly before the collision captures the helicopter pilot saying, “PAT 2-5 has aircraft in sight, ...

short time later, audio we obtained pinpoints the moment inside the air traffic control tower as they witnessed the collision. Audible gasps heard in the background and seconds later. The national ...

Air traffic controller audio obtained by CNN from ... including a loud “oooh” in the background apparently from the tower, at the moment of the crash. "Tower, did you see that?" ...