well its not a joke, if thats what your asking...
Forward Air Controllers from the Air Force work in conjunction with the airborne and ground units to establish air support laison. This guys talk the aircraft in so they can put ordenance down on some enemys head http://www.afa.org/magazine/Sept2003...ontroller.html
this might help. 
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“If we should have to fight, we should be prepared to do so from the neck up instead of from the neck down.”— General James H. Doolittle, USAAF
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