books.google.com - Airborne early warning aircraft systems-most often referred to as "AWACS"- are among the most significant elements of modern air forces; by placing powerful radar units atop airborne aircraft, air forces are able to vector friendly fighters directly to enemy aircraft, allowing smaller fighter forces...http://books.google.com/books/about/AWACS_and_Hawkeyes.html?id=lUN__e4yC_IC&utm_source=gb-gplus-shareAWACS and Hawkeyes
