World Apr 12

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The Nuclear Security Summit: A Viewer’s Guide

President Obama has invited leaders from nearly 50 nations to Washington this week for a global summit on how to keep nuclear weapons out of the hands of terrorists. The two-day summit, which officially kicks off Monday, caps what's been…

World Apr 06

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U.S. Nuclear Policy Limits Use and Threat of Weapons

The Obama administration released Tuesday a new set of guidelines for nuclear weapons, including not threatening their use against signatories of the Nuclear Non-Proliferation Treaty in an effort to encourage other countries' adherence to the treaty.

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