The U.S. claims China is conducting secret nuclear tests. Here's what that means

The allegations were leveled by U.S. officials late last week. Arms control experts worry that norms against nuclear testing are unraveling.

Last nuclear weapons limits expired—pushing world toward new arms race

For the first time in more than half a century, there are no binding restraints on the buildup of the largest nuclear forces ...
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Fact check: Which country has the most nuclear weapons

When Donald Trump ordered testing of nuclear weapons to resume – for the first time in 33 years – he claimed that the US possesses more nukes than any other country. In fact, it is how the US ...
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Iran quietly crosses the line to weapons-grade nuclear power

Iran’s stockpile of uranium enriched to 60% purity has surged to levels that leave the international community with a shrinking window to act. The buildup, documented in the IAEA’s latest confidential ...

The world’s top nuclear powers have no arsenal limits, here are the countries with nukes

The expiration of the New START treaty leaves more than 10,000 U.S. and Russia nuclear weapons unconstrained for the first time in decades.
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A New Nuclear Arms Race Is Looming

President Donald Trump has ordered preparations to resume U.S. nuclear weapons testing, citing alleged Russian and Chinese violations. Moscow and Beijing deny conducting explosive nuclear tests but ...

With no arsenal limits in place, here are the countries that hold highest number of nuclear weapons

With the last major arms control pact gone, attention turns to the nine nations that possess nuclear weapons and the scale of their stockpiles.