The airspace around Washington, D.C., is congested and complex — a combination aviation experts have long worried could lead ...

The fatal midair collision between an American Airlines passenger jet and an Army helicopter followed a string of near misses ...

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

Lawmakers have lobbied to add flights, while pilots have complained about the presence of military and other aircraft.

Almost nine months before Wednesday night’s midair collision at Ronald Reagan National Airport, Maryland’s two U.S. senators warned about the safety implications of overcrowding the airspace ...