Scary indeed given that Philadelphia is mentioned - I live about 50 miles north-west of Philly ... hopefully, the wind will be blowing east as usual - fallout from small nukes can be considerable ... the amount of fallout generated from a nuke isn't necessarily proportional to its energy output.
I registered NuclearAttack.com a few years back - will likely develop, but for a limited time I'm offering it for sale...
http://NuclearAttack.com
Ron