A compilation of links and perspectives (unfortunately not recently updated) from Harvard University's Belfer Center for Science and International Affairs.
由哈佛大学贝尔弗科学与国际事务研究中心所汇编的链结和观点(可惜并非最近更新的)。
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According to the Belfer Centre at Harvard University, there is around 1.6m kg of highly-enriched uranium and 0.5m kg of weapons-grade plutonium in the world.
She is a senior fellow at Harvard's Belfer Center for Science and International Affairs and the President of the Council for the Advancement of Science Writing.