After a military helicopter collided with a passenger plane near Reagan National Airport, here’s what to know about TCAS, a ...

The Visitor Toll Pass transponder is a free, temporary toll pass for rental car customers traveling round-trip through the airport. With this toll transponder from CFX, drivers will pay the lowest ...

The collision occurred in airspace that is difficult to navigate. Flight data, video and air traffic control audio show how the tragedy unfolded.

A Black Hawk military helicopter and an American Airlines plane collided near an airport in Washington, D.C., on Wednesday.