We do not want to lower the bar so much that others are encouraged to try to jump up and reach it particularly those who see nuclear weapons as a shortcut to global influence.

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World powers, particularly Western nations, suspect that Iran wants to build nuclear weapons, although Tehran insists its nuclear program is for peaceful purposes.

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Some world powers, particularly Western nations, suspect that Iran is seeking to build nuclear weapons.

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Some world powers, particularly Western nations, suspect that Iran is seeking to build nuclear weapons, although Tehran insists its nuclear program is for peaceful purposes.

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This is particularly disconcerting in light of the fact that Israel would presumably be the target for any Iranian nuclear weapons.

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The horror of nuclear conflict may make its occurrence unlikely, but the very existence of nuclear weapons leaves the human race ever at the brink of self-destruction, particularly if the weapons fall into the wrong hands.

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But he said he is is particularly concerned about the security and stability of Pakistan, which is fighting its own campaign against the Taliban and has nuclear weapons.

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