"In the wake of recent failed negotiations over Iran’s nuclear program, it seems
increasingly unlikely that a political solution will be reached regarding
Tehran’s increasing uranium enrichment. As a result, some form of military clash
between the US and Iran, while by no means certain, is becoming increasingly
likely. Such a clash can take many different forms, and each presents different
levels of risk." CSIS
IMO the premise of this paper is wrong. The essential competitiion in the Middle East is between Israel and Iran, not Iran and the US. If there is such a rivalry, it is largely created by a willingness on the part of the US to assume Israel's strategic liabilities as its own.
Iran contributes to that willingness by making threatening noises and playing stupid diplomatc games but it is hard to conceal the fact that absent an Iranian attack on US assets or people or a serious threat to the US homeland the issue of hegemony in the Middle East, is a regional issue.
Unless the US is, in fact, the policeman of the world, why should we concern ourselves with Iranian "assymetric capabilities?" pl