The arrest of an F.A.A. employee on assault and battery charges comes as flight operations at the airport have been under scrutiny since a passenger jet and an Army helicopter collided in January.

Air traffic controllers at Washington's Ronald Reagan National Airport are being offered crisis counselling following a fight in the control tower and a near-miss incident, just two months after a fatal midair collision.

Ronald Reagan National Airport was the scene of a recent near miss and control tower brawl, more than two months after a collision killed 67 people.