Deadliest U.S. Air Disaster in 20 Years - Mid-Air Collision Over Potomac River Daily Life Update Breaking News:The deadliest Air Disaster in the U.S in more than two decades! "The deadliest Air Disaster" The mid air collision right here over the Potomac River. And American Airlines passenger jet and AUS Army Blackhawk helicopter.authorities now saying no one survived. surveillance video showing the moment of impact, the sudden fireball in the sky over Washington, DC. This is alert 3. The alarming call from air traffic control. And American Airlines flight out of Wichita, KS out approach to Reagan National Airport. The U. S Army Blackhawk helicopter on a night training mission colliding with the jet....