US Plane Crash: What led to the crash between passenger jet and army helicopter in one of the 'most controlled skies'?

A deadly collision between an American Eagle passenger jet and an Army Black Hawk helicopter occurred over Washington, D.C., resulting in both aircraft crashing into the Potomac River. While investigators continue their efforts, the incident raises significant questions about air traffic management, safety systems, and human factors in the heavily regulated airspace. The investigation is likely to be lengthy, and officials have warned its too soon to speculate on the cause.