President Volodymyr Zelenskyy has suggested that if the United States is unwilling to support Ukraine's NATO membership, it ...

The North Korean leader said the partnership poses a grave threat to his country and vowed to further bolster his nuclear ...

Leader Kim Jong Un pledged to pursue "sustained countermeasures," citing security ties between the U.S. and its regional allies.

Since the 1990s, the United States has used science to verify its nuclear weapons are working properly. NPR was granted a rare look at how they do it.

But don't think the United States is eager to agree to those terms. "The chance of them getting their nuclear weapons back is somewhere between slim and none," retired Lt. General Keith Kellogg ...