Larry Shemetulskis, Tektronix southeast U.S. channel manager, briefs on the operations of an oscilloscope used for analyzing electromagnetic signals during the Annual Keesler Air Force Base Tech Expo inside the Bay Breeze Event Center at Keesler Air Force Base, Mississippi, Feb. 11, 2020. The expo, hosted by the 81st Communications Squadron, was held to introduce military members to the latest in technological advancements to bolster the Air Force�s capabilities in national defense. (U.S. Air Force photo by Kemberly Groue)
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