As public protest in Tehran seems to dwindle, at any rate on the streets, many Arab leaders are quietly exhaling a sigh of relief. At first, a lot of them were quite chuffed by the sight of turmoil in Iran, since they have long felt edgy about their big neighbour's rising ambition and influence in the region. But as time passed they began to feel queasier: the prospect of revolution in the streets, albeit those of a rival power, is not something most Arab regimes, wedded to the status quo at home, truly welcome.
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