Israel is 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 Treaty (NPT).[1] The US Congress Office of Technology Assessment has recorded Israel as a country generally reported as having undeclared chemical warfare capabilities, and an offensive biological warfare program.[2] Officially, Israel neither confirms nor denies possessing nuclear weapons.
OTA-ISC-559
was invoked but never defined (see the help page).