How do I know war is certain, as opposed to 'maybe'? Might be a bit dated, but this is how:

On July 27, just before Friday prayers, Iran’s supreme leader Ayatollah Ali Khamenei summoned top Iranian military chiefs for what he called “their last war council.”

“We’ll be at war within weeks,” he told the gathering, debkafile’s exclusive Iranian and intelligence sources disclose.

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Source: Global Geopolitics
http://glblgeopolitics.wordpress.com/2012/08/01/khamenei-warns-irans-top-leaders-war-in-weeks/