HOLLOMAN AIR FORCE BASE, N.M. -- Senior Airman Sean Kowalczyk, 49th Communications Squadron, goes over an emissions security reference guide at the 49th Maintenance Squadron Jan. 7, 2011. Airman Kowalczyk ensures an adequate space between classified and unclassified machinery to avoid classified signals bleeding through to unauthorized equipment. (U.S. Air Force photo by Airman 1st Class Eileen Payne/Released)
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