CBU-72

The CBU-72 Fuel Air Explosive (FAE) bomb, also sometimes referred to as a "cluster bomb," is an air-delivered weapon designed to create a large blast and incendiary effect. The CBU-72 dispenses a cloud of highly volatile liquid, typically propane or propylene oxide, which rapidly mixes with atmospheric oxygen. This cloud is then detonated by a separate charge, creating a powerful overpressure wave and intense heat.

The primary effect of the CBU-72 is the rapid consumption of oxygen within the affected area, creating a vacuum effect, followed by a high-pressure explosion. This can be particularly devastating in enclosed or semi-enclosed spaces such as caves, tunnels, and bunkers. The weapon's blast effect is significantly greater than that of conventional high explosive ordnance of similar size.

The CBU-72 was developed and used by the United States military, most notably during the Vietnam War. Its use has been controversial due to the indiscriminate nature of its effects and the potential for civilian casualties. The weapon is designed to destroy or neutralize enemy personnel and equipment within a designated area, but its wide area of effect raises ethical concerns regarding its application in populated zones. The term "CBU" refers to "Cluster Bomb Unit," although the CBU-72 functions through a different mechanism than typical cluster munitions which release multiple submunitions.