42°06'21.3"N 19°49'41.2"E - Photos taken by Gwinnett EAS / Frank Hasani. According to locals, the sirens do alert for tests and hi-lo for emergencies.
42°04'35.3"N 19°45'21.4"E - Photos taken by Gwinnett EAS / Frank Hasani. According to locals, the sirens do alert for tests and hi-lo for emergencies.