What, precisely, are these sited (that is, non-mobile, fixed installation; that's what "sites" means) ABM weapons that NATO has allegedly installed in Eastern Europe? What is the name of the weapons system, who builds it, etc.?
I suggest asking Niccolo Soldo what he means. I am not his grammarian or military advisor. The primary source supporting this statement would be statements attributable to the Kremlin. I am a fact checker either. All of this would be thread hijacking if I went for it. So maybe discuss a theme of the author and stop nitpicking