What part of nuclear history haven't you been paying attention to.
Have sanctions worked? From what I've seen they've only created hate and discontent and abject poverty to the citizens of the affected country. You want to make suicidal martyrs that may potentially carry the nuke you so fear into the heart of your country?
In my mind you get more in the long run with simple good example than you do with sanctions. Do you truly think Fidel Castro would still be in power in Cuba if our citizens went in mass daily as tourists into his closed society? What killed the Soviet Union wasn't our military blustering but the simple fact that they couldn't keep the glow of the success of the rest of the world out of their dungeon.
Art