Regional airlines are a major, but sometimes hidden, part of the aviation system in the U.S. Here's how they operate with major carriers.

Add Yahoo as a preferred source to see more of our stories on Google. The pilots of an American Airlines commuter jet and an Army Black Hawk helicopter were put on a collision course over the Potomac ...

NTSB: FAA-designed helicopter route near flight path was chief factor in crash. Investigators also cite overreliance on pilots to ‘see and avoid’ other aircraft. NTSB issues 50 safety recommendations, ...