As fighting continues in Ukraine with Russian nuclear weapons now in Belarus, there are continuing concerns that Moscow may move nuclear weapons into Ukraine (BBC, ABC News, Politico). Ukraine includes the boundaries generally recognized by the international community, including Donbas and Crimea. For the purposes of this question, Russia or Belarus' detonation of a nuclear device in Ukraine would be considered a Russian or Belarusian public announcement that it moved nuclear weapons into Ukraine. A radiological device (aka "dirty bomb") would not count (Nuclear Regulatory Commission).

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