Nuclear weapon - Wikipedia
A nuclear weapon[a] is an explosive device that derives its destructive force from nuclear reactions, either nuclear fission (fission or atomic bomb) or a combination of fission and …
Nuclear weapon | History, Facts, Types, Countries, Blast Radius ...
Sep 23, 2025 · A nuclear weapon is a device designed to release energy in an explosive manner as a result of nuclear fission, nuclear fusion, or a combination of the two. Fission weapons are …
Nuclear Weapons - Our World in Data
How many states have nuclear weapons, and how many warheads do they have? How is this changing over time? Explore research and data on nuclear weapons.
What is a Nuclear Weapon? The Science, History, and Global …
Apr 9, 2025 · At their core, nuclear weapons are devices designed to release an enormous amount of energy through nuclear reactions, either by splitting atoms (fission) or combining …
Which countries currently have nuclear weapons? | AP News
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 — …
Trump orders Pentagon to begin testing nuclear weapons …
6 hours ago · The U.S. voluntarily halted nuclear explosive testing in 1992, though it has the ability to restart tests at a site in Nevada.
Trump orders US nuclear weapons testing to begin 'immediately' …
6 hours ago · Trump orders immediate resumption of U.S. nuclear weapons testing to match global programs, citing Russia and China's advancing capabilities in major policy shift.
Trump instructs Pentagon to start testing nuclear weapons ‘on an …
1 day ago · President Donald Trump on Thursday threatened to begin testing US nuclear weapons in response to actions by rival countries, an announcement that came moments …
Donald Trump says US will 'immediately' start testing nuclear weapons
5 hours ago · President Donald Trump announced on Oct. 29 that the United States will "immediately" resume nuclear weapons tests. In a Truth Social post, Trump touted progress …
Status of World Nuclear Forces - Federation of American Scientists
Mar 26, 2025 · Despite progress in reducing nuclear weapon arsenals since the Cold War, the world’s combined inventory of nuclear warheads remains at a very high level.