The FAA is permanently closing one key route and evaluating alternative helicopter routes after the National Transportation Safety Board this week made two urgent safety recommendations following the Jan. 29 mid-air collision of an American Airlines regional jet and an Army helicopter that killed 67 people.

The Federal Aviation Administration announced a "series of steps" it will take to address safety concerns after a fatal midair crash near Ronald Reagan Washington National Airport.

The closure of the helicopter route near the airport makes permanent the restrictions put in place after Jan. 29 midair collision.