[John21]

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I argue that bombing their oil fields will accomplish that and perhaps lead to the downfall of their evil regime.

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I really doubt the former will ever be employed unless there's no other means to achieve the latter. We're kind of caught in this spot of separating the leadership in different Mid-East states from the people, and most of our tactics seem to be focused on preserving the welfare of the civilians while engaging the leaders.

Sure, we could take out Iran's oil pipeline, but that's really just an extension of taking out the their power, water, and food supply-line. There's nothing that could prevent us from doing this, just like there would be nothing to prevent us from doing that in Iraq, but it doesn't necessarily fit into our overall objectives.

I think the overall objectives are:
1) preventing the emergence of a ME super-power.
2) the establishment of a quasi-democratic states (1970's Iran).
3) complete instability if (2) can't be established.