He could show the pdf's (that have apparently been removed from U.S. Federal websites that had them) that document their presence, then show the location, then show what those locations look like now. This, of course, is assuming the reports of the bioweapon sites is true, and that they were bombed is true. I just don't know what is really going on with Ukraine, and I don't think anyone except Putin does.
They'll just claim that Putin is lying.
He could show the pdf's (that have apparently been removed from U.S. Federal websites that had them) that document their presence, then show the location, then show what those locations look like now. This, of course, is assuming the reports of the bioweapon sites is true, and that they were bombed is true. I just don't know what is really going on with Ukraine, and I don't think anyone except Putin does.