In light of the recent premier of "24", where a 1KT suitcase nuke was detonated near Los Angeles, you can go here and show the damage radius and effects of a 1KT nuclear device on your home town. Hurray for fear mongering! EVERYBODY PANIC!
You will need to know your town's longitude and latitude, or if you are in/near a major city there are some named locations. Easiest way to get your town's longitude and latitude is to Google Search just that: Your town's name longitude latitude. Example: "Allentown, PA longitude latitude" or "Allentown, PA coordinates". You can also get them from Google Earth, Terraserver, or many online map sites.