Why not?
After 9-11 the USA should have taken out the Saudi oil fields. Could you imagine the gasps from the mouths of the limp-wristed Europeans and arabs?
It would have scared the crap out of the North Koreans as well.
Putzing around in Afghanistan and Iraq is all well and good, perhaps, but there's notbing better than nuking enemies while you still have the ability.
Time is of the essence and we've allowed the moment of shock and surprise to escape our enemies.