U.S. Air Force Airmen from the 210th Engineering Installation Squadron add an antenna to a newly installed Giant Voice stack located on the roof of the Small Air Terminal at the 133rd Airlift Wing in St. Paul, Minn., June 19, 2017. Once complete, the system will provide improved emergency notification capabilities to flight line and maintenance personnel while aircraft engines are running. Strobes will also light up on top of the stack as an added visual durning alerts. (U.S. Air National Guard photo by Tech. Sgt. Austen R. Adriaens)
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