The cyber-attacks carried out by Syria last week were much more broad than initially reported, and they amounted to a warning shot of the retaliation the U.S. could expect if it should attack. Subsequent attacks would most likely go after U.S. infrastructure, and given how fragile it is and the likelihood Iran or North Korea would help out, the result could be massive.
As I write this, the U.S. has deployed a battle group to Syria in preparation for a missile strike against the government there, and Russia has deployed what appears to be a counter force. What most seem not to be factoring in is that Syria has already fired its warning shot with attacks on Twitter and The New York Times, at least.
The U.S. has a tendency to overreact, and it is clear there's insufficient preparation for the infrastructure collapse that could occur when Syria responds to a missile attack -- and Russia exists as a wild card that could cause the conflict to spread rapidly out of control.
It's been common knowledge for some time that the U.S. infrastructure is vulnerable to outside attack and that governments like Syria and China have been probing it and probably know exactly where and how to do the most damage. There's a very real likelihood that this time the U.S. won't go unscathed, and it may be prudent to have a plan in place should things go very, very wrong. Details