Ukraine, formerly a republic of the Union of Soviet Socialist Republics (USSR) from 1922–1991, once hosted Soviet nuclear weapons and delivery systems...

actively researched and later employed weapons of mass destruction (WMD) from 1962 to 1991, when it destroyed its chemical weapons stockpile and halted its biological...

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

three types of weapons of mass destruction: nuclear, chemical, and biological weapons. The U.S. is the only country to have used nuclear weapons on another...

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

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

weapons of mass destruction but does have some of the key technologies needed to produce nuclear weapons. Brazil is one of many countries (and one of...

or believed to possess weapons of mass destruction. During the Cold War, Soviet nuclear warheads were stockpiled in Poland and designated to deploy within...

stockpile of weapons of mass destruction. This stockpile of chemical weapons included 16,678 kilograms (36,769 lb) of mustard gas, lewisite, adamsite, and phenacyl...

believed to possess weapons of mass destruction, and to be one of four nuclear-armed countries not recognized as a Nuclear Weapons State by the Non-Proliferation...