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From a suspected Israeli airstrike in Sudan to cyber warfare in the Gulf and a drone shot down over Israel, the largely hidden war between Iran and its foes seems heating up and spreading. 'In many ways, it's reminiscent of the Cold War, particularly the proxy conflicts,' says Hayat Alvi, lecturer in Middle Eastern politics at the US Naval War College. 'But unlike in the Cold War, there are now a much larger number of asymmetrical warfare techniques. Most of this is happening behind the scenes, but in the modern world we are finding it difficult to keep them secret for that long.'