It was not all that long ago when Washington DC had a massive system of ACA Alertors. You would think many would remain since the 70s but that is not the case.
Very few remain as most were intentionally taken down for no defined reason. The very few sirens that are still around are completely decommissioned or broken beyond repair. I only know of one ACA allertor active as a fire siren in the rural aria west of washimgton dulles international airport.
I mentioned this a few times in another topic about siren dead zones.
Isn't Washington DC the first target priority for north korea and terror attacks anyways?