How do two planes just "Collide" ?
Discussion
It was a regional jet and an Army Blackhawk.
Just like two galaxies
Especially on a clear night, beside an airport and the military helicopter would have been trained on heightened awareness around DC approach paths. Very suspicious
This is either going to be pilot error, or a communications systems failure in the minutes prior to the crash. The helicopter was warned about the jet 30 seconds before the impact, but never responded to the tower. That could be a communications failure, potentially leaving the helicopter pilot without crucial information, or it could indicate some other mechanical problem that was occupying the pilot's attention right before the crash. There's a number of plausible scenarios, so we really have to wait for the investigation to reveal the cause.
Usually when someone’s not doing their job.
I suspect we'll learn the Blackhawk was at fault. The plane was on a routine flight plan, and was on approach only 2300ft from the runway. The Blackhawk was behind, and below the jet based on video and air traffic control calls. It was warned about the jet 30 seconds before impact, but never responded. It just flew straight into the rear of the aircraft. It's gonna be a bitch to recover the data recorders because of the temperatures and the fact that they're on the bottom of the Potomac River. And I don't expect there will be any survivors.