News tonight of a government BlackHawk helicopter on a VIP transport training mission causing a midair collisions with a commercial airliner landing in DC.

Unconfirmed reports of four survivors so far, developing situation.

This is the most serious domestic US commercial air disaster since 2009.

#DC #PlaneCrash #US #military #AA5342 #TCAS #Aviation #AmericanAirlines #blackhawk