OT/FYI:
For those living/working in Lower Manhattan, NYC has sent out the following notice:

Notification 1 issued 9/16/09 at 12 PM. The Port Authority will conducting tests of its Emergency Mass Notification System at the World Trade Center from 9/16/09 to 9/18/09 between the hours of 9 AM & 5 PM. Residents in lower Manhattan may hear loud sirens and pre-recorded messages.