War II, Japan had several programs exploring the use of nuclear fission for military technology, including nuclear reactors and nuclear weapons. Like the...

three types of weapons of mass destruction: nuclear weapons, biological weapons, and chemical weapons. It is one of the five nuclear-weapon states recognized...

The Italian nuclear weapons program was an effort by Italy to develop nuclear weapons in the late 1960s and early 1970s. Italian scientists such as Enrico...

Germany undertook several research programs relating to nuclear technology, including nuclear weapons and nuclear reactors, before and during World War...

manufacture nuclear weapons and is the only country to have used them in combat, with the bombings of Hiroshima and Nagasaki in World War II against Japan. Before...

nuclear weapons to defend themselves against an offensive assault from the Soviet Union. From 1945 to 1972 the government ran a clandestine nuclear weapons...

1922–1991, once hosted Soviet nuclear weapons and delivery systems on its territory. The former Soviet Union had its nuclear program expanded to only four of...

of nuclear weapons. Five are considered to be nuclear-weapon states (NWS) under the terms of the Treaty on the Non-Proliferation of Nuclear Weapons (NPT)...

Nuclear proliferation is the spread of nuclear weapons, fissionable material, and weapons-applicable nuclear technology and information to nations not...

Korea has a military nuclear weapons program and, as of 2024, is estimated to have an arsenal of approximately 50 nuclear weapons and sufficient production...

are known to possess a nuclear triad, being capable to deliver nuclear weapons by land, sea and air. American nuclear weapons of all types – bombs, warheads...

possess nuclear weapons. Pakistan began developing nuclear weapons in January 1972 under Prime Minister Zulfikar Ali Bhutto, who delegated the program to the...

the Biological Weapons Convention since 1975, the Treaty on the Non-Proliferation of Nuclear Weapons since 1991, and the Chemical Weapons Convention since...

develop and test nuclear weapons, and is one of the five nuclear-weapon states under the Treaty on the Non-Proliferation of Nuclear Weapons. The UK initiated...

This timeline of nuclear weapons development is a chronological catalog of the evolution of nuclear weapons rooting from the development of the science...

possesses nuclear weapons and previously developed chemical weapons. Although India has not released any official statements about the size of its nuclear arsenal...

France is one of the five "Nuclear Weapons States" under the Treaty on the Non-Proliferation of Nuclear Weapons, but is not known to possess or develop...

made during the 1930s, the United Kingdom began the world's first nuclear weapons research project, codenamed Tube Alloys, in 1941, during World War...

developed and possesses weapons of mass destruction, including chemical and nuclear weapons. The first of China's nuclear weapons tests took place in 1964...

by the United States against the Japanese cities of Hiroshima and Nagasaki in 1945 during World War II. Nuclear weapons have only twice been used in warfare...

chemical weapons, and the Japanese conducted a serious, though futile, nuclear weapon program. Since World War II, the United States military based nuclear and...

Nuclear disarmament is the act of reducing or eliminating nuclear weapons. Its end state can also be a nuclear-weapons-free world, in which nuclear weapons...

Japan's non-nuclear weapons policy is a policy popularly articulated as the Three Non-Nuclear Principles of non-possession, non-production, and non-introduction...

the new weapons of mass destruction? At the time, nuclear weapons had not been developed fully. Japan conducted research on biological weapons , and chemical...

and a pure fusion weapon remains a hypothetical device. Nuclear explosions are used in nuclear weapons and nuclear testing. Nuclear explosions are extremely...

nuclear weapons had been developed, scientists involved with the Manhattan Project were divided over the use of the weapon. The only time nuclear weapons have...

missiles with miniaturized nuclear weapons, soon entered service, and regular transits of U.S. nuclear weapons through Japan began thereafter. U.S. leaders...

statements widely seen as nuclear blackmail. The possibility of Russia using tactical nuclear weapons, and the risk of broader nuclear escalation, has been...

produce a nuclear weapon. However, it has not opted to make one. South Korea has continued on a stated policy of non-proliferation of nuclear weapons since...

Nuclear weapons delivery is the technology and systems used to place a nuclear weapon at the position of detonation, on or near its target. Several methods...