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On September 10, 2022, the Kassel sirens were triggered for a test alarm. It was planned for 10 a.m. Due to technical difficulties, the test alarm was delayed by about 20 minutes. Fire alarm - warning the population - fire alarm and then another fire alarm were triggered. Greetings to @Rheinlandsirene and @hls_united674, who were also convinced of the functionality of the HLS!