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Restricted Data is a blog about nuclear secrecy, past and present, run by Alex Wellerstein, an historian of science at the American Institute of Physics.

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Daisy Alliance is a peace organization seeking nuclear nonproliferation and disarmament. The Alliance is dedicated to the eradication of all weapons of mass destruction (WMDs), whether nuclear, chemical, or biological.

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Explore HISTORY shows, watch videos and full episodes, play games and access articles on historical topics at History.com.