Ronald Reagan Washington National Airport (DCA) remained shut down on Thursday morning.

The airports terminals remain open.

If true, that would make this the deadliest U.S. air crash in nearly 24 years.

Ronald Reagan Washington National Airport, currently closed to all flights

A view inside Ronald Reagan Washington National Airport, currently closed to all flights, after a passenger plane on approach to Reagan National Airport crashed into the river after colliding with a US Army helicopter.Credit:ANDREW CABALLERO-REYNOLDS/Getty Images