I believe this pushes things up a notch.

New Missiles for Iran Impact Hagel Debate

Snips from article:

According to a report broadcast this morning on Fox News, diplomatic sources are saying that a Russian air defense system sold to Syria is now being transferred to Iran.

But no matter what it means for Syria, the arrival of the missiles in Iran will make a big difference for Western and Israeli military forces contemplating air strikes on the Islamist regime’s nuclear sites. Iran’s air defenses would be immeasurably strengthened were it able to deploy enough of the mobile phased radar array weapons....

[link to www.commentarymagazine.com]