 The AGM-114N Hellfire II, first used by U.S. forces in 2003 in Iraq, uses a Metal Augmented Charge (MAC) warhead that contains a thermobaric explosive fill using aluminium powder coated or mixed with PTFE layered between the charge casing and a PBXN-112 explosive mixture.When the PBXN-112 detonates, the aluminium mixture is dispersed and rapidly burns.The resultant sustained high pressure is extremely effective against people and structures.