Sure, we have seen the testing of those missiles the Russians are keeping on hold for 35 years ...
Just like the anti-ICBM treaty wherein we gave up numerous operational missiles and had no defense against incoming Russian missiles, while the Russians grandfathered their anti-ICBM missiles into the treaty (each missile had a 5 kt nuclear warhead), and were stationed around Moscow and other vital cities.
The Russian ABM sites around Moscow look very well maintained even now.