The NTSB is investigating "thousands of data points" to find the cause of the fatal D.C. plane-helicopter crash, including whether air traffic control staff was short personnel.

Audio has been posted on social media which purportedly reveals the conversation between the control tower at Ronald Reagan National Airport (DCA) and an Army Black Hawk helicopter shortly before it ...

This data point is one of several key mysteries investigators are exploring as they seek to explain what caused the nation's worst air disaster in more than a decade, aviation experts said.

An American Airlines plane carrying 60 passengers and four crew members collided with an Army Black Hawk helicopter outside ...