In the present time, there is an air defense network around Washington DC. It uses the NASAMs system. Anything that is determined to be a threat can be engaged with surface launched AIM-120C missiles.
That Pentagon shaped pool really caught my eye, then the long covered building, had to look it up. Now I know all about the David Taylor Model Basin and the Naval Surface Warfare Center's Explosive Test Pond.
https://www.kongsberg.com/kda/what-we-do/defence-and-securit...