A type of bomb used to damage large areas with enormous and intense flames slightly above ground level.
Shortly before impact with the ground, FAE devices atomize a large amount of fuel, typically ethylene oxide. This forms a large cloud of air and fuel -- which as we all learned in elementary school are two of the three ingredients for fire. The fuse creates a spark or explosion (depending on the FAE bomb) which ignites the cloud of fuel causing an enormous burst of flame which quickly burns itself out.
The most significant use of FAE bombs is to clear minefields with as little risk or damage as possible. The FAE explosion covers a large area and causes a sudden pulse in air pressure at ground level, which is strong enough to detonate most mines (either by triggering them or igniting the explosive contained within).
FAE bombs were originally designed for use in the Vietnam War and a small amount of second generation FAE devices were utilized in the Gulf War1.
Some FAE weapons:
1 Early in the Gulf War, Iraqi soldiers frequently misinterpreted FAE attacks as miniature nuclear ones. FAE explosions cause a large cloud to appear and rise upward due to the increase in temperature and frequently create a large shockwave -- which are also symptoms of nuclear explosions.