[Brian_K_White]

No matter how many times you remove the top of any list, there is still a top of the list. It accomplishes nothing.

True, carrying a pail of nerve gas, or even merely gasoline, somewhere out of context will be prevented generally for it's mere potential, but there are several things about that:

It was a remarkable out of context event, not someone merely existing as they do all day every day, where their weapon is a part of them like their wallet or their knowledge.

You don't have to carry anything large that is detectable without a rather invasive search which you cannot perform outside of maybe North Korea.

You don't have to carry anything at all. The danger is all in the will and abilities of any individual.

Saying nuclear bomb is a form of Godwin's law. Merely saying it at all exposes that one is not arguing from meaningful thought or data but pure hyperbole and emotion.