LIVE: Transportation Secretary Sean Duffy holds a press conference

Watch live as Transportation Secretary Sean Duffy holds a press conference.

Federal investigators looking for the cause of the January collision between a passenger jet and an Army helicopter near Washington, D.C., that killed 67 people recommended a ban on some helicopter flights Tuesday to improve safety, saying the current setup “poses an intolerable risk.”

A military helicopter collided with the American Airlines jet as it was approaching Ronald Reagan National Airport over the Potomac River on Jan. 29.

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