That still didn't answer my question. Why the perpetrator choose a poison which functioned more on propaganda than killing.

Is Yushchenko a superman who is poison proof? Or is new KGB too incompetent to pick up a poison? Or something else? Who benefit from it?

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If Feds call you and defame my message, it is a tactic of intimidation. They don't want people know the fact.
It also proves what I wrote are truth. They are afraid of it.