Re: Todays target...
But the sad fact is that you can cause a lot more damage, inconvenience and "terror" a lot more cheaply by flying someone else's airplane into a tower. It's taken over a decade for the world to right itself after that at enormous military expense and there's still a lot of things that have never returned to how they were before (e.g. airport security procedures for travellers, certain countries' reputations, etc.)
Taking down the data networks of an entire country is no mean feat - especially given the diversity and sheer number of connections that involves cutting (e.g. taking down satellites too). And you're unlikely to affect the military because they have their own independent means of communication and, if you do, well that's an act of war and someone will get blasted back to the 19th Century pretty damn quickly.
That's the problem with Bond villains - they try to scale up before they've actually created any reasonable mayhem in the first place. Fort Knox, Silicon Valley, global media, a satellite that reflects the Sun, it's all too ambitious for a first hearing of their name and they have a shocking tendency to be susceptible to and victim of pretty young women who know their entire plans.
If you wanted to cause chaos today, take out the DNS servers. Smaller target, easier to do, much more impact (and requires little technical know-how to actually take down once you know where they are). Gain yourself a reputation, and THEN threaten things that would have huge, permanent knock-on effects. Hell, you'd probably do more damage to the world by taking out a certain software company than anything else.