The number of Chinese operational nuclear warheads has increased by more than 100 to over 600, the Pentagon reported.

China is building a large-scale laser-ignited nuclear fusion research facility in Mianyang to enhance both nuclear weapons ...

A thousand feet beneath the desert, the United States conducts experiments to verify that its weapons work. But some fear a ...

North Korean leader Kim Jong Un inspected a facility that produces nuclear material and called for bolstering the country’s ...

China appears to be building a large laser-ignited fusion research centre in the southwestern city of Mianyang, experts at ...

The U.S. hasn't tested a nuclear weapon in decades, and since the 1990s has used simulations and experiments to verify they're working properly. NPR was granted a rare look at how they do it.

An ally of newly-minted president Donald Trump's is arguing that the United States should resume nuclear weapons testing to ...

North Korean leader Kim Jong Un has called for bolstering nuclear forces this year during a visit to a nuclear material ...

North Korean leader Kim Jong Un has inspected a facility involved in nuclear material production and called for strengthening ...

Trump, who held unprecedented summits with Kim during his first term and has touted their personal rapport, said last week he ...

North Korean leader Kim Jong Un inspected a facility that produces nuclear material and called for bolstering the country’s ...