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.

Iran's Supreme Leader Ali Khamenei said Friday that negotiating with the United States will not solve Iran's problems, describing such negotiations as ...

Failing to achieve market share for America’s nuclear power politics likely will decrease its influence over the evolving ...

DUBAI, United Arab Emirates (AP) — Iran’s supreme leader said Friday that negotiations with America “are not intelligent, ...