Debunking Theories of a Terrorist Power Grab
Network Reliability on the Electric Grid (from Miller-McCune Debunking Theories of a Terrorist Power Grab
Hines and Blumsack's study ... shows that the most vulnerable points are the ones that have the most energy flowing through them -- like huge power stations or highly connected transformers.
Article Do topological models provide good information about electricity
I think there is something to learn about generalizing network reliability and vulnerability across fields (electricity, transportation, etc.). Network structure, and the underlying technology, matter.