There’s little doubt that terrorists would use dirty bombs or other WMD of any and every kind, as I said, “if they were available.” The US being first to use nuclear weapons has little bearing on who the next one will be, or when, or how, or on who. The reality, not the hysteria, is that it will happen.
Terrorism, being a tactic, has little to no bearing on the size of the weapon used during the demonstration. The term, “measured doses” has no limit, and therefore is of no practical use as we contemplate the real possibilities.
You’ve been carried away by the hype. There’s a great deal of doubt about terrorist’s use of nuclear weapons, supposing they had them.
Terrorism, as I said, is the weapon of the nearly powerless. It’s only used by people who have no better or more direct means of getting their way.
If you’re NOT nearly powerless–if you have the kind of real power that posession of a nuclear weapon provides–then whole other, much more effective vistas of opportunity open up before you.
With the bomb, you don’t have to go around staging violent stunts and absorbing crushing counter-strikes, hoping that your opponant’s overreaction will change the balance of power in your favour.
If you have the bomb, you can retire to some corner of the world and announce that your enemies should leave you the heck alone, because you are now a government.
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And if you really do have a bomb, they will.
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Once again, despite the hype, the only thing even a bit like a dirty bomb which has ever been deployed is the US’s use of depleted uranium shells.