I keep hearing people talk about how volatile and unbalanced these regimes are, how their thinking is "different" than ours, and therefore makes them more likely to use a nuclear weapon.

To date, however, I have seen no evidence showing that they have ever acted irrationally on an international level.

Pakistan has a lot more internal terrorism than Iran, but their nukes seem pretty damn secure.

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"Have you no decency, sir? At long last, have you left no sense of decency?"
-Joseph Welch