Obama policy sets limits on when nuclear weapons could be used

President Obama on Tuesday unveiled a sweeping nuclear-weapons policy that puts new constraints on when the arms could be used and calls for high-level talks with Russia and China to better understand their plans for their arsenals.

Defense Secretary Robert M. Gates told a news conference that any nonnuclear country that dared to use weapons of mass destruction against the United States would still "face the prospect of a devastating conventional military response."

Obama policy sets limits on when nuclear weapons could be used

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