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

(You can hear a portion of the air traffic control communications over radio in the video player at the top of this story.) ...

WASHINGTON—Just after 8:47 p.m. on Wednesday, an air-traffic controller at Reagan National Airport relayed a seemingly ...

Air traffic control audio from a plane crash near Ronald Reagan National Airport sheds light on the moments before and after ...

Air traffic controller audio and radar reviewed by NPR offer some insight into what happened before the collision near Ronald ...

The radio transmissions indicate that the helicopter ... been “standard” communication between the aircraft and air traffic control tower. “I would say the helicopter was aware that there ...

The Army helicopter and the commercial airliner would have been operating on different radio frequencies, but communications with air traffic control would still be handled by one air traffic ...

Using radio traffic, flight data and leaked footage of an air traffic control radar screen, we examine what was happening in the moments before the midair collision near Reagan National Airport that ...

A recording obtained by this news organization contains chatter between airport tower employees and crew on the small plane ...

Margaret Wallace, who teaches air traffic control and airport management at the Florida Institute of Technology, discusses the outdated technology underlying the U.S. air traffic control system.

Air traffic control communications reveal the moments ... About five minutes later, another voice comes on the radio asking, "What's going on down there?" "We have a lost aircraft," the operator ...

But one thing has been clear for decades: America’s air-traffic control system, once the world’s most advanced ... forcing pilots and controllers to rely on much less precise readings from radio ...