The National Transportation Safety Board is an independent federal agency tasked with examining serious transport-related accidents.

National Transportation Safety Board Chair Jennifer Homendy said Thursday at a press conference that “we look at facts on our investigation and that will take some time.”

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.

A deadly plane crash over the Potomac River near Washington, D.C. canceled flights to and from Ronald Reagan National Airport overnight. The airport reopened around 11 a.m. Thursday, as the search continues for the 64 people on board the American Airlines plane that collided with a U.

CBS News confirmed only one air traffic control worker was managing the helicopters when the crash between a military helicopter and passenger plane occurred in Washington D.C. That is a job normally done by two people.

The National Transportation Safety Board was scheduled to provide an update on Thursday on the deadly airplane-helicopter crash over Washington, D.C. Watch live at 2:45 p.m. on Thursday, Jan. 30 in the video player above.

An American Airlines plane with 60 passengers and four crew members on board collided with a military helicopter near Washington, D.C., on Wednesday night, plunging into the Potomac River.