how about this one: "Interest Rate Armageddon, The Day After OPEC Dropped the Dollar." Or maybe "Basket of Currencies, The Day Inflation Came Home." Nah, still sounds boring.
Actually, to me those sound terrifying. At this time I am not worrying about EMP. Having looked into it, I haven't been able to find any proof Iran, NK, or other minor powers have the technology to get a nuke that high (+300 miles) above the USA. As much as a terrorist group would like the put us in the dark I feel they'd take the easier route of trucking the nuke into a city then detonating it, and even that I consider to be a low threat. Sidenote: I'll start worrying once a rogue power develops a rocket strong enough to do this.
Economic disasters seem much more likely to me at this time.
-Blast
p.s. I welcome any information or links indicating terrorists currently have the launch capabilities needed.