Obama limits when U.S. Can use nuclear weapons

Obama Limits When U.S. Can Use Nuclear Weapons

WASHINGTON -- President Obama said Monday that he was
revamping American nuclear strategy to substantially narrow
the conditions under which the United States would use
nuclear weapons, even in self defense.

The strategy eliminates much of the ambiguity that has
deliberately existed in American nuclear policy since the
opening days of the Cold War. For the first time, the United
States is explicitly committing not to use nuclear weapons
against non-nuclear states that are in compliance with the
Nuclear Non-Proliferation Treaty, even if they attacked the
United States with biological or chemical weapons, or
launched a crippling cyberattack.

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http://www.nytimes.com/2010/04/06/world/06arms.html