The Delta aircraft received an “onboard alert” that another aircraft was nearby, and air traffic controllers issued ...

A congressional hearing Thursday reinforced the idea that the January midair collision between an American Airlines passenger ...

Investigators are still in the early stages of determining why the jetliner and helicopter ... air traffic control system. The Army identified the Black Hawk crew as Capt. Rebecca M.

Investigators previously said the helicopter may have had inaccurate altitude readings in the moments before the crash, and the crew may not have heard key instructions from air traffic controllers.