Nuclear weapon - Wikipedia
Strategic nuclear weapons are targeted against civilian, industrial, and military infrastructure, while tactical nuclear weapons are intended for battlefield use.
Nuclear weapon | History, Facts, Types, Countries, Blast Radius ...
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 reaction. …
Mapped: Only a handful of countries own the world’s nukes — here’s ...
2 days ago · The expiration of the New START treaty leaves more than 10,000 U.S. and Russia nuclear weapons unconstrained for the first time in decades.
Nuclear Weapons - Our World in Data
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 …
Top nuclear powers face zero arsenal limits as more countries get nukes
For the first time in decades, the world’s largest nuclear powers are operating without hard caps on their arsenals just as more countries flirt with the bomb. The expiration of New START on ...
How Nuclear Weapons Work | Union of Concerned Scientists
Sep 29, 2016 · At the center of every atom is a nucleus. Breaking that nucleus apart—or combining two nuclei together—can release large amounts of energy. Nuclear weapons use that energy to create …
Nuclear Weapons: Who Has What at a Glance - Arms Control Association
At the dawn of the nuclear age, the United States hoped to maintain a monopoly on its new weapon, but the secrets and the technology for building the atomic bomb soon spread. The United States …
Status of World Nuclear Forces - Federation of American Scientists
Mar 26, 2025 · Combined, the United States and Russia now possess approximately 86 percent of the world’s total inventory of nuclear weapons, and 83 percent of the stockpiled warheads available for …
Atomic Bomb: Nuclear Bomb, Hiroshima & Nagasaki - HISTORY
Sep 6, 2017 · Scientists first developed nuclear weapons technology during World War II. Atomic bombs have been used only twice in war—both times by the United States against Japan at the end of …
The Nuclear Weapon Archive - A Guide to Nuclear Weapons
Greg and I are actively collaborating to provide the broadest variety of nuclear weapon information, in the most convenient form that we can. The two sites each have a different focus. The Nuclear …