Nuclear Weapons Information & Analysis

Nuclear weapons remain the most destructive force in human history, capable of devastating entire cities within seconds and leaving lasting environmental damage for decades. Understanding nuclear arsenals, their capabilities, and the risks they pose is essential for anyone following global security developments. This hub consolidates verified information from official sources including the Federation of American Scientists, the Stockholm International Peace Research Institute (SIPRI), and government defense departments.

9 countries currently possess nuclear weapons: United States, Russia, United Kingdom, France, China, India, Pakistan, Israel (undeclared), North Korea. Russia and the United States together hold approximately 90% of the world's nuclear warheads, with combined arsenals exceeding 11,000+ weapons as of early 2026, according to SIPRI 2025 Yearbook estimates. The strategic balance between these powers, along with emerging nuclear states, shapes global security calculations and drives much of the diplomatic activity monitored by defense analysts.

Beyond arsenals, nuclear preparedness involves understanding blast effects, fallout patterns, and survival strategies. The resources below cover everything from blast radius calculators based on declassified weapons data to practical survival guides drawn from civil defense research. Historical events like Hiroshima and Nagasaki provide real-world data on nuclear effects, while incidents such as the Cuban Missile Crisis and the 1983 Soviet nuclear false alarm demonstrate how close the world has come to nuclear exchange.

All information presented is fact-checked against primary sources and official records. Speculative content is clearly labeled, and we distinguish between confirmed capabilities and intelligence estimates. For continuously updated threat assessments, visit our Nuclear Threat Level Today page or explore individual topics below.