National Journal experts debate. Here's Paul Pillar:

The consequences of a military strike against Iran would be widespread, very costly, and highly damaging to U.S. interests. A sample of what to expect can be gleaned from a recent simulation organized by the Saban Center at the Brookings Institution, which began with an Israeli strike against Iranian nuclear facilities. Before long there were Iranian missiles fired against Saudi Arabia as well as Israel, a skyrocketing of oil prices after closure of the Strait of Hormuz, and a worldwide Iranian terrorist campaign against the United States, amid other chaos and mayhem.

Larison moderates.

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