Families and friends of those who lost loved ones in the deadly American Airlines and Army helicopter collision are sharing tributes online in memory of the crash victims.

A passenger jet collided with an Army helicopter Wednesday near Reagan Washington National Airport.Four crew members and 60 passengers were aboard the jet, per a statement from American Airlines.A military spokesperson said the UH-60 Black Hawk helicopter was on a training flight.

The Black Hawk helicopter that crashed into an American Airlines flight was alerted to the plane’s presence by air control twice.