Inspired by the following answer (which I'm sure is not entirely serious) to a previous question of mine. Or, in the tradition of Ukrainian Saint Olga, Zelensky might also be seeking a face to face meeting in order to secure for himself an opportunity to engage in treachery. Perhaps Zelensky plans on wearing a bullet proof vest and concealing a small pistol that he could use to personally assassinate Putin. Maybe that's too old school, and modern norms have changed. But, if that was the real ...
