Obama Must Decide Degree to Which U.S. Swears Off Nuclear Weapons

Obama Must Decide Degree to Which U.S. Swears Off Nuclear Weapons
Mary Beth Sheridan and Walter Pincus, The Washington Post
http://www.washingtonpost.com/wp-dyn/content/article/2010/03/05/AR2010030502260.html

Obama President Obama's top national security advisers will within days present him with an agonizing choice on how to guide U.S. nuclear weapons policy for the rest of his term.

Does he substantially advance his bold pledge to seek a world free of nuclear weapons by declaring that the "sole purpose" of the U.S. arsenal is to deter other nations from using them? Or does he embrace a more modest option, supported by some senior military officials, that deterrence is the "primary purpose"?
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* Statement by President Obama on the 40th Anniversary of the Nuclear Nonproliferation Treaty
http://www.whitehouse.gov/the-press-office/statement-president-obama-40th-anniversary-nuclear-nonproliferation-treaty