Officials want to permanently keep helicopters away from commercial jets taking off and landing at a busy Washington, D.C., airport after the deadliest U.S. aviation accident in more than two decades.

Crews have finished recovering the wreckage of a plane and helicopter that collided mid-air, killing 67 people.

The FAA has reopened two runways at Reagan Airport following the Jan. 29 plane crash between an American Airlines flight and a Black Hawk helicopter.