Vapors : Thermobaric weapon
A fuel–air explosive (FAE)
Wiki:Thermobaric and fuel–air explosives have been used in guerrilla warfare since the 1983 Beirut barracks bombing in Lebanon, which used a gas-enhanced explosive mechanism, probably propane, butane or acetylene.[60] The explosive used by the bombers in the 1993 World Trade Center bombing in the US incorporated the FAE principle, using three tanks of bottled hydrogen gas to enhance the blast.[61][62] Jemaah Islamiyah bombers used a shock-dispersed solid fuel charge,[63] based on the thermobaric principle,[64] to attack the Sari nightclub in the 2002 Bali bombings.[65]