Alert was nothing special, as it failed to go off. However, you can hear the surrounding 2001's. http://www.youtube.com/watch?v=PzbagkhNSfY&fmt=18
Now, the siren did activate for the attack....however, not dual tone, but single tone. This sounds like it has a new Federal signal Modulator tone generator. http://www.youtube.com/watch?v=o9ZLZi6iJHQ