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a nation-wide attack upon the aircraft noise problem. NANAC was composed, originally, of the Aerospace Industries Association (consisting of the principal airframe and engine manufacturers), the Air Line Pilots Association (comprising 15,000 licensed commercial airlines pilots), and the Air Transport Association of America (made up of the 46 scheduled certificated-route carriers of the United States). Subsequently the organization was expanded by the participation of the Airport Operators Council (now the Airport Operators Council International, made up of the 107 member organizations, representing more than 600 public airports in the 50 states of the United States, and 10 foreign states), and the American Association of Airport Executives (the managers and directors of more than 400 airports through-out the United States).
NANAC has been responsible for the performance of extensive research in connection with the reduction of aircraft noise at source (i. e., aircraft engine and frame design), flight procedures for noise reduction, and improvements in ground environment. NANAC was a pioneer and the leading force in bringing about widespread cooperative noise abatement