To order Nuclear war Bush would have to get the approval of Congress. (Fool them once, a travesty, fool them twice, no way.) And they know the American people wouldn't vote them in again. Ain't democracy grand. Besides which, his house (White House) would be the counter target. He's too self-centered to allow for that!
In Qatar, Kerry seeks to convince Gulf Arabs on Iran deal (Reuters)
from the article: Islamic Movement head: J'lem destined capital of caliphate