A thermobaric weapon, also called an aerosol bomb, or a vacuum bomb,[1] is a type of explosive munition that works by dispersing an aerosol cloud of gas, liquid or powdered explosive.[2][3] The fuel is usually a single compound, rather than a mixture of multiple substances.[4] Many types of thermobaric weapons can be fitted to hand-held launchers,[5][6] and can also be launched from airplanes.