Getting a nuclear weapon to its target can be as hard as making one. The explosive material can be placed in a bomb or artillery shell, or into a missile. When a nuclear device is placed on a missile it will commonly be called a nuclear missile. Nuclear missiles can be carried by airplanes, submarines, or trucks, or they can be placed into underground missile silos. Some kinds of airplanes like the B-29 Superfortress, B-36 Peacemaker, B-52 Stratofortress and B-2 Spirit have carried nuclear weapons. 