The purpose of the looking at the future...is to disturb the present!

Gaston Berger (1896-1960), francuski futurolog

Washington, DC, Plane Crash: Everything We Know So Far

Air traffic controllers asked Flight 5342 to switch runways when coming in to land. Black box recordings from the jet and the military helicopter it collided with will help reveal whether this contributed to the accident.
Link :
https://www.wired.com/story/washington-dc-plane-crash-everything-we-know-so-far-black-hawk-faa-potomac-american-airlines-psa/