I am very concerned about North Korea
First off, there is no way the US will do a full scale military attack against Iran like we have done on Iraq. The Iran military is far to organized and there is a bigger fish to fry to the east, N. Korea. In the south east corner of Turkey the Israeli air force does practice and presumably reconossaince missions near and over Iran every day. This air force is large, we're talking serious military business here and the message is clear. Israel (The US) will not tolerate any nuclear proliferation in the region. So expect tactical air raids on Iran in the coming future and full blown covert CIA ops to throw this government on its ass. Clerics know what to look for so any special ops from intelligence will probably fail.
North Korea is the real deal. I think the most possible scenario that will lead to war is when the US blockades the outgoing freight ships searching for a softball sized chunk of plutonium, uranium and a couple of other fissile substances. Of course the US would be searching the ships because of krypton gas being detected over land. It's a scary scenario any way one looks at it. The North Koreans could very well have sold some fissile material to some thugs with the know how, materials and patience to detonate it in Los Angeles, New York, SF, DC -take your pick of crowded important cities. Prediction: The US will be rocked with a rogue nuclear attack on one of our great cities within ten years. But, back to war with N. Korea. We can win the war undoubtedly. The losses will be massive to S. Korea -one million in an hour! It's easy to understand why any administration would want to beat the diplomatic path until somehow it works. A couple of constants to keep in mind S. Korea doesn't want to go to war for the reason above and China doesn't want war because of the mass migration that will take place. In the end we know N. Korea will not keep its word. I fear a war with this country is inevitable. Can we expect sane behavior from an administration that starves 10%-15% of their fellow citizens, of course not. Families starve to death in the countryside, young feeble innocents are put to work in slave camps only to be rewarded with hunger, torture and finally death - City dwellers are untrusting of each other for fear of being accussed of disloyalty to the "Dear Leader" for any reason. There is a reward system for turning in the disloyal, yes, you might feed your family that evening for finding the traitor, or maybe you'll get some heating oil so your children don't freeze for that day. There is no light at the end of the tunnel as long as Kim Jong Il and his cronies are in power. I believe this is the first catastrophic war to come in the 21st century -though I hope I'm wrong.