Well trump wants a "golden dome" which will never happen. First of all, our country is far too large to make that even remotely feasible. And second, if anyone attacks us, it'll be with weapons far more advanced than the iron dome is capable of dealing with. Their enemies use old tech that can be mostly defeated with a system like that in a small enough area. That just doesn't work for a country as big as the US. Especially when talking of drone swarms and (real) hypersonic missiles.