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Whenever Western countries want to take down another country's leader, there always seems to be one department that just proposes stuff from cartoons, like when they tried to kill Castro with an exploding cigar. (Not comparing Castro to Hitler incidentally, I just mean in terms of trying to assassinate people.)
As far as I know these plans have never worked, but one day they'll pull it off and kill Putin by dropping a piano on him or something and it'll be glorious.