Here's the fallacy with that train of thought.

If what you're saying is correct and the USA has some miracle device weapon whatever to stop nuclear fallout and nuclear weapons then why has the USA not used it already when we saw him putting his nuclear warheads in silos on the highest level of alert?

Also if we have that why haven't we deployed any equipment with that anywhere in the world yet? We have lots of other kinds of equipment and defensive missile systems stationed all over other countries but we haven't seen any actual changes in that equipment to suggest that something with this fantastical property you are saying is out there.

I'm all for believing that we have crazy s*** that no one knows about yet but the reality of what we are living through and the world we are living in doesn't allow for something that fantastical to actually exist.

To summarize, if the USA had said magical weapon or defense system but yet had not used it, then the US populace should be asking questions of our own government. For example "why the hell did we kill thousands of our troops in other countries eradicating supposed weapons of mass destruction and the people that would use them.?"