In considering the risks, the emphasis has shifted over the last decade from preventing additional states from acquiring nuclear weapons to preventing terrorist groups and other non-state actors from acquiring them (or critical components).
过去十年来，考虑风险时的重点从阻止新的国家获得核武器转变为阻止恐怖组织和其他非国家行动方获得核武器（或其关键成分）。