Released audio recording from 9/11/01 of FDNY Manhattan borough fire dispatch mixer during the World Trade Center terrorist attack. I tried to normalize the audio since the dispatcher side of the mixer had very low volume. I was shocked that I couldn't find this file on YouTube. This is roughly 4 hours long. I removed the last 40 minutes of audio due to the volume being too low to hear anything, even with processing. Remember to honor the 343 firefighters who gave their lives that day while saving others.