A fuel-air explosive device consists of a container of fuel and two separate explosive charges. After the munition is dropped or fired, the first explosive charge bursts open the container at a predetermined height and disperses the fuel in a cloud that mixes with atmospheric oxygen (the size of the cloud varies with the size of the munition). The cloud of fuel flows around objects and into structures. The second charge then detonates the cloud, creating a massive blast wave. (For a demonstration of a FAE explosion, see the U.S. Naval Air Warfare Center Weapons Division, China Lake, California, page at http://www.nawcwpns.navy.mil/clmf/faeseq.html.) The blast wave destroys unreinforced buildings and equipment and kills and injures personnel. The antipersonnel effect of the blast wave is more severe in foxholes, on personnel with body armor, and in enclosed spaces such as caves, buildings, and bunkers.
Fuel-air explosives were first developed, and used in Vietnam

Vietnam

Vietnam – sometimes spelled Viet Nam , officially the Socialist Republic of Vietnam – is the easternmost country on the Indochina Peninsula in Southeast Asia. It is bordered by China to the north, Laos to the northwest, Cambodia to the southwest, and the South China Sea –...

, by the United States

United States

The United States of America is a federal constitutional republic comprising fifty states and a federal district...

. Soviet scientists, however, quickly developed their own FAE weapons, which were reportedly used against China

China

Chinese civilization may refer to:* China for more general discussion of the country.* Chinese culture* Greater China, the transnational community of ethnic Chinese.* History of China* Sinosphere, the area historically affected by Chinese culture...

 in a 1969 border conflict and in Afghanistan

Afghanistan

Afghanistan , officially the Islamic Republic of Afghanistan, is a landlocked country located in the centre of Asia, forming South Asia, Central Asia and the Middle East. With a population of about 29 million, it has an area of , making it the 42nd most populous and 41st largest nation in the world...

. Since then research and development has continued and currently Russian forces field a wide array of third-generation FAE warheads.