Under the Non-Proliferation Treaty (NPT), the United States, Russia, the United Kingdom, France, and China are recognized as 'nuclear-weapons states' (NWS).
Notes on verification
Confirmed by multiple independent, authoritative sources including arms control organizations and government publications.
Sources
- List of states with nuclear weapons (en.wikipedia.org)
- https://www.armscontrol.org/factsheets/nuclear-weapons-who-has-what-glance (armscontrol.org)
- https://www.nti.org/education-center/treaties-and-regimes/treaty-on-the-non-proliferation-of-nuclear-weapons/ (nti.org)
- https://commonslibrary.parliament.uk/nuclear-weapons-disarmament-and-arms-control/ (commonslibrary.parliament.uk)