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.

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.

Human error or mechanical error or a combination of both? Those are some of the questions the National Transportation Safety Board will look into to determine the cause of Wednesday night’s crash involving a CRJ twin engine passenger jet and a black hawk military helicopter over the Potomac River.

More than 60 people were killed when an American Airlines regional passenger jet collided with a U.S. Army Black Hawk helicopter on Wednesday and crashed into the frigid Potomac River near Ronald Reagan Washington National Airport.

Last year, senators from Virginia and Maryland sounded the alarm over congestion in the skies above Washington.

Officials with the National Transportation Safety Board (NTSB) held their first press conference Thursday afternoon following a deadly collision just outside of Reagan National Airport (DCA) on Wednesday night.

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.”

Latest news and live updates after an American Airline jet collided with a Black Hawk helicopter over the Potomac River.

The leadership of the National Transportation Safety Board held a news conference Thursday afternoon to talk about the investigation into a midair collision involving a commuter jet

The National Transportation Safety Board will be holding its first briefing into the investigation of the deadly American Airlines plane crash in Washington, DC. Click to watch.

Jennifer L. Homendy, the chair of the National Transportation Safety Board, said the probe will focus on several factors: “the human, the machine and the environment.”

Two people were handling the jobs of four inside Reagan National Airport’s control tower on Wednesday night, according to a government report.