Thermobaric weapon
In 2000, Human Rights Watch quoted United States authorities, on how the blast's "kill mechanism against living [things or] targets is unique—and unpleasant.... What kills is the pressure wave, and more importantly, the subsequent [vacuum or] rarefaction, which ruptures the lungs.... If the fuel [burns or] deflagrates but does not [... explode], victims will be severely burned and will probably also [... breathe] the burning fuel. [... The] most common FAE fuels [or fuel-air explosion fuels], ethylene oxide and propylene oxide, are highly toxic"; Breathing unexploded FAE adds to the risk of (related) death.