Know this has been said before, but there is precious little food in the urban ring. A week at most, maybe another week with door to door scavenging.
They the ferals will turn their attention to the suburban rings. How successful they will be will be determined on how prepared materially and mentally suburbanites and rural dwellers are.
You have to be prepared to box them back up in the urban confines and then dictate terms.
And tell the UN there will be no airlifts.
I wrote this a few years ago. It’s gotten a whole lot of reads floating around on the internet.
Bracken: When The Music Stops – How America’s Cities May Explode In Violence (EBT SHTF scenario)
http://www.freerepublic.com/focus/f-chat/3136803/posts?q=1&;page=1