To my knowledge this is the 4th such incident to occur at this location and to my recollection this occurred last April in 2013. This is the typical attack flight pattern. It did this for about 20 minutes. By the way their is an elementary and middle school about 3, 4 and 5 blocks from this location which I believe was in session. A hospital is also within this distance. I am an American citizen and I state this as only a matter of record. Think and do with it what ever you will.