The NTSB is investigating "thousands of data points" to find the cause of the fatal D.C. plane-helicopter crash, including ...

Clues emerging from the moments before an Army helicopter collided with a passenger jet suggest breakdowns in the system ...

The National Transportation Safety Board said it was too soon to speculate the cause of the deadly crash. Skaters, parents, ...

In the first 24 hours, we usually know very little, and often what we think we know turns out to be false in the days and ...

Among the questions is whether an Army helicopter deviated from its approved flight path before it collided with a passenger ...

Investigators found the recording devices, or black boxes, from the American Airlines plane that collided with a helicopter ...

U.S. authorities said on Thursday it was not yet clear why a regional jet and a U.S. Army helicopter collided at a Washington ...

Divers are expected to return to the Potomac River as part of the recovery and investigation after the United States’ ...

Divers are expected to return to the Potomac River on Friday as part of the recovery and investigation after a midair ...

Police boats returned to the Potomac River on Friday as part of the recovery and investigation after a midair collision ...

Federal investigators say they hope to have a preliminary report on the deadly mid-air crash in D.C. within a month. 67 ...