A mini-nuke is a low yield nuclear weapon which has much less explosive power than the most powerful nuclear weapons available. Such devices are also known as suitcase nukes when designed for sabotage operations.
Because of the relatively small yield, a state can plan to use these weapons while hoping to counter negative public reactions associated with nuclear war.
Any potential plan to produce mini-nukes by the United States has been blocked by the United States Congress, which prohibited the development of any nuclear weapons with a yield of less than five kilotons . Previously, tactical devices such as the Davy Crockett recoilless rifle offered yields under one hundred tons, but all existing devices in the U.S. arsenal have much higher yields. Nuclear bunker busters are a separate development, utilizing warheads with ten to several hundred kilotons of yield.