Confusion and ambiguity are dangerous in nuclear brinksmanship. President Donald Trump spread both on Wednesday when he posted on Truth Social an error-filled and unclear order for the U.S. to “immediately” resume nuclear weapons tests. Trump’s message was sent just before his meeting with Chinese President Xi Jinping in Busan, South Korea.

A ship believed to be carrying Russian fuels is on its way to Cuba, putting US President Donald Trump’s sanctions to the test amid the island’s deepening energy crisis.

A top arms diplomat at the State Department recently laid out what might come next as Washington upends decades of federal policies on nuclear proliferation.

Did China conduct secret nuclear tests? The United States thinks so. Host Mary Louise Kelly speaks with NPR Pentagon correspondent Tom Bowman and NPR China correspondent Jennifer Pak about China's nuclear arsenal and U.

Remarks by a top administration official appeared to be aimed at dispelling skepticism of its assertions, as President Donald Trump vows to restart U.S. tests.

Trump got intense when Llamas asked him about his age, pointing excitedly to his head and bragging about repeatedly "acing" a "cognitive mind test."

By Victoria Waldersee MADRID, Feb 20 (Reuters) - Pedro Sanchez’s thinly veiled criticisms of U.S. policy play well with his voters but are irritating Spain's powerful ally, where political advisers close to the White House warn the Socialist prime minister to watch his step.

Participants in this year's field test of the 2030 census may be asked about their U.S. citizenship status, the Trump administration revealed Thursday. The proposal, which is part of a regulatory filing for the test, comes months after President Trump ...