Nuclear nonproliferation requires national sovereignty; states must believe that they can preserve their security without nuclear weapons. Where international law is respected, and powerful states can ...

Declassified Cold War documents, prepared by the Government, have unveiled the extent of a potential Russian nuclear assault on the UK. At least 38 towns and cities were deemed at risk from Soviet ...

President Trump explained the order by saying other, unnamed nations were testing their own nuclear weapons, even though no country has tested since 2017. By David E. Sanger and William J. Broad David ...