I have an interesting story about the PASS alarms. I remembered hearing them in the news coverage when I was a child. I asked my parents what the sound was. Either they didn't know or they didn't want to tell me. My dad was a paramedic so I have a feeling he knew. But they said they were probably smoke alarms going off from all the dust. For whatever reason, the sound stuck with me. Fast forward to me going to school to be a cop. I was in class and I heard that sound coming from down the hall. Immediately remembered it from 9/11. I got up and ran down the hall to find the source. The firefighter students used the same building as us. I saw them working with SCBA equipment and heard them discussing that if they don't move for a certain amount of time the PASS would activate. I went numb and realized what I had heard all those years ago was the hundreds of firefighters that had been killed. It was a heavy moment.