Russia tried out its vaccum mega bomb

12.09.2007 Vacuum bomb - a bomb that uses a fuel-air explosive; "a thermo baric bomb can create overpressures equal to an atomic bomb"
An explosive device fused to explode under specific conditions: a device consisting of a container of fuel and two explosive charges; the first charge bursts open the fuel container at a predetermined height and spreads the fuel in a cloud that mixes with atmospheric oxygen; the second charge detonates the cloud which creates an enormous blast wave and incinerates whatever is below