My Dad, MSgt Bethel S. Hendrix, was a silent warrior. He served in the United States Air Force Security Service — the USAFSS — from 1959 until 1970 during the Vietnam War and the Cold War. The USAFSS was composed primarily of airmen culled from the cream of the Air Force’s enlisted recruits, (the top one-half of one percent). The USAFSS was a secretive and tight-knit branch of the Air Force and they were tasked with monitoring, collecting and interpreting military voice and electronic signals of countries all over the world. These jobs, which required top secret codeword clearance, were extremely high pressure and were considered essential to U.S. cold war efforts.