Washington: All we know about the mid-air collision as dozens feared dead

Search and rescue efforts are seen around a wreckage site in the Potomac River from Ronald Reagan Washington National Airport, early Thursday morning. Picture:AP Photo/Carolyn Kaster

A jet with 60 passengers and four crew members collided with an Army helicopter while approaching Ronald Reagan National Airport near Washington, DC, sending the two aircraft plummeting into the Potomac River.

Everyone on board the two aircraft is feared dead, officials said on Thursday.