I have been thinking more of dirty bombs in expensive neighborhoods. What would cause more upheaval and economic damage than contamination several neighborhoods of $1-4 million dollar homes? You could have several five ton trucks going off spreading bad stuff...the neighborhoods would suddenly have no values, if they were indeed contaminated in radiation, and I am sure all the homeowners in the city would lose market value, as a lot of them would get out of Dodge. Talk about a quick Real Estate Bubble burst. Or a University...if you rendered a UC campus uninhabitable, that is billions of dollars....
But they wouldn't attack Berkeley, that would ruin their support base in the US...