It ain't necessarily so -- Hill Air Force Base, Dugway Proving Ground (CBW), a major international airport, national crossroads highways and rail lines, ski resorts, and (hope not) religious sites......... If the Chinese decide to launch ICBM's, then the Salt Lake City area MAY be in the top 20. If we're talking Arab foot soldiers, no way.
I'm not worried about a major attack. I am more afraid of a small chemical or biological attack that causes major panic and hysteria. In the bigger cities there would be large scale looting and chaos.
I am going this weekend to add to my 72 hour kit so that my family and I can sit tight outside of town at my sisters house until things calmed down.