Strategic nuclear weapons are targeted against civilian, industrial, and military infrastructure, while tactical nuclear weapons are intended for battlefield use.

Under the Non-Proliferation Treaty (NPT), the United States, Russia, the United Kingdom, France, and China are recognized "nuclear-weapons states" (NWS). They are also the five permanent members …

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Nov 11, 2025 · Atomic bombs work with nuclear fission. Two subcritical masses of uranium or plutonium are quickly put together to form a critical mass —that is, enough material to start a runaway fission …

Jan 15, 2024 · Interactive nuclear explosion simulator with scientific accuracy. Comprehensive nuclear education covering nuclear weapons, nuclear technology, nuclear policy, and nuclear science. …

Jun 18, 2025 · Nine countries currently either say they have nuclear weapons or are believed to possess them. The first to have nuclear arms were the five original nuclear weapons states — the United …

Jun 12, 2025 · A nuclear weapon is an explosive device that derives its destructive force from nuclear fission, nuclear fusion, or a combination of the two. Nuclear weapons are alternately called atom …

Comprehensive overview of the United States's nuclear weapons program. Detailed data on warhead inventory, deployment status and nuclear capabilities.

Mar 26, 2025 · Combined, the United States and Russia now possess approximately 87 percent of the world’s total inventory of nuclear weapons, and 83 percent of the stockpiled warheads available for …

Explore research and data on nuclear weapons. By: Bastian Herre, Pablo Rosado, and Max Roser. This page was first published in August 2013 and last revised in February 2024. The world’s nuclear …