Engineering achievements

[KeithB]

"I do not know which corporation now owns these complexes, but they are located in the European part of the former USSR on the territory of three independent states. Are there any analogues of these complexes in the world?"

I am not sure what you mean by "these complexes", but all the US nuclear design agency sites are still going strong:
Los Alamos, Laurence Livermore, Sandia, Pantex, Kansas city plant...

There are still a lot of silos in operation, too.

Speaking of EMP testing (which I suspect is a bit of an urban legend), Sandia still has the test site where US planes (including B-52's!) were tested. You can see it sometimes when you take off from the Albuquerque airport.

https://en.wikipedia.org/wiki/ATLAS-I

Anybody see the fly-by during the superbowl? A B-52, a B-1(!) and a B-2.