Let's start with the biggest domestic economic problems. Almost any one of them is a greater threat to the economy than virtually any imaginable form of terrorism. There is the record-breaking budget deficit that is likely to amount to $5 trillion over the next decade. Then there's the burgeoning trade deficit. And the $72 trillion in unfunded future retirement and health care obligations to our own citizens. And a record low savings rate, which suggests that we will need even more help with retirement funding. And the hemorrhaging of manufacturing jobs and the cost of fixing our dysfunctional health care and energy systems. Every one of these is a gigantic problem on its own. Taken together, they represent a series of bombs placed at the foundations of our society, and they are capable of exploding in ways that would touch more Americans than anything even the most sophisticated terrorists could devise.