""DCA is one of the most demanding airports in the world. It also has what’s known as ‘helicopter alley’ with hundreds of police, military, news and rescue helicopters criss-crossing the Potomac River,

There is at least one casualty after a helicopter crash at a major airport tonight. All runways have been shutdown and all departures and landings have been halted at the DCA Ronald Reagan Washington National Airport.

Extraordinary video captured the moment a fireball exploded in the sky as an aircraft crashed into a blackhawk helicopter at Ronald Reagan Washington Airport.