There's no indication the U.S. Army Black Hawk crew could tell there was an impending collision before its devastating crash with an American Airlines plane in Washington, D.C., according to the NTSB.

The National Transportation Safety Board gave an update on its investigation into the deadly midair collision between an American Airlines plane and a Black Hawk helicopter.

In the weeks since the crash, the NTSB has been analyzing flight data and damage to determine how this happened.

The National Transportation Safety Board is holding a briefing to provide additional information on the Jan. 29 midair collision near Reagan National Airport.

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