Irregular air-traffic control staffing at Ronald Reagan Washington National Airport is under scrutiny after a deadly accident earlier this year. It isn’t the first time.

Airlines for America calls on the Federal Aviation Administration to permanently suspend some helicopter routes near the airport with limited exceptions for essential military or medical emergencies.

A group representing U.S. airlines plans to urge federal aviation officials to permanently reduce helicopter traffic around Reagan National Airport outside Washington, D.C., following a January collision by an Army Black Hawk into an American Airlines regional jet that killed 67 people.

The Federal Aviation Administration is investigating why several flight crews on Saturday received faulty alerts of potentially nearby aircraft on arrival at Washington's Reagan National Airport. The

The FAA said that several flight crews inbound to the Reagan National Airport reported onboard alerts when no other aircraft were nearby.

The FAA is investigating reports about recent flights at Reagan National Airport in Washington, D.C., receiving false alarms about midair collisions over the weekend.