The Wall Street Journal examined flight route and elevation data to show the moments before American Airlines Flight 5342 fatally collided with ​an Army Black Hawk helicopter.

The F.A.A. restricted helicopter routes nearby in the aftermath of the Wednesday collision. For some officials, the concerns about clogged airspace were a long time coming.

An American Airlines plane carrying 60 passengers and four crew members collided with an Army Black Hawk helicopter outside Reagan National Airport near Washington, D.C. Wednesday night. A D.C. fire official said Thursday that “we don't think there are any survivors from this accident" and "we are switching from a rescue operation to a recovery operation.

Ronald Reagan Washington National Airport (DCA) services both military helicopters and passenger planes every day.

Questions remain over the mid-air collision between a jet, which was carrying 64 people, including the crew, and a military helicopter carrying three soldiers