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.

A 3 1/2-hour power outage Monday at Baltimore-Washington International Marshall Airport caused significant flight delays and some cancellations.

WASHINGTON (Reuters) - More than two dozen flights headed to Ronald Reagan Washington National Airport were impacted on Friday by recent rules barring flights during presidential helicopter trips, flight tracking site Flightradar24 said.