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Russian President Vladimir Putin gave orders to his nation's nuclear forces over the weekend, but their exact meaning is unclear. Russia has more nuclear weapons than any other nation.
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Russian President Vladimir Putin put Russia's nuclear forces on high alert over the weekend in a significant escalation of his military threat.
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Three decades ago, the newly independent country of Ukraine was briefly the third-largest nuclear power in the world. A lot has changed since then.
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President Biden and three European allies say they are ready to return to the scuttled deal that eased sanctions against Iran, in return for Iran limiting its nuclear program.
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Megan Rice spent two years in federal prison while in her 80s after breaking into a government security complex to protest nuclear weapons.
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Khan launched Pakistan on the path to becoming a nuclear weapons power in the early 1970s. His family said he died of COVID-19 following a lengthy illness.
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The agreement came days before Iran was likely to be censured for failing to cooperate with the International Atomic Energy Agency.
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Satellite imagery showing a new tunnel comes just weeks after the discovery of two new nuclear missile fields in other parts of China.
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Reviving The Iran Nuclear Deal: Here's What It Involves And Why It's HardBefore the U.S. pulled out, the deal gave Iran money and gave the world assurances that Iran wasn't trying to build nuclear weapons.
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The International Atomic Energy Agency and Iran announced an deal to keep some verification activities going for the immediate future. Iran earlier had said it would suspend snap inspections.