After North Korea nuclear missile, how many nuclear arms countries including Israel:

Nine countries possess nuclear weapons: U.S., Russia, China, France, UK, India, Pakistan, North Korea, and Israel (undeclared). Studying nuclear proliferation highlights its role in global security, the challenges of non-proliferation, and its impact on geopolitics. It also offers insights into how nuclear capabilities shape power dynamics, providing lessons on the need for disarmament treaties and diplomacy to prevent escalation and ensure global stability.