About the Author: Hillary Rodham Clinton serves as the U.S. Secretary of State.
The Nuclear Security Summit ended on Tuesday, bringing to a close a substantive two week period in which the United States signed an arms control treaty with Russia, reoriented our defense posture toward the threats of the 21st century, and worked with our allies and partners to secure all vulnerable nuclear material over the next four years.
I was honored to be a part of the Nuclear Security Summit in which representatives from 47 nations, as well as the European Union, United Nations and IAEA, joined together to keep vulnerable nuclear materials out of the hands of terrorists or criminals.
This is not something any nation can do alone. At the Summit, leaders committed to safeguard nuclear materials under their control. And they agreed to work toward signing key international treaties on nuclear security and nuclear terrorism.
During the course of the Nuclear Security Summit, I held numerous bilateral meetings with my counterparts and leaders. For example, my Russian counterpart, Sergey Lavrov, and I signed an agreement that cleared the way for the disposal of 34 metric tons of weapons-grade plutonium -- enough to make 17,000 nuclear weapons. This will help establish a framework for eliminating even more plutonium in the future.
We also reached agreements with Ukraine, Canada, Mexico and Chile -- to name a few -- to secure enriched uranium and separated plutonium.
But the Summit is only part of our broader commitment to reduce the threat posed by nuclear weapons.
Last week, the Obama Administration released the latest Nuclear Posture Review. This provides the strategic framework for our nuclear weapons policy and pledges for the first time that the United States will not use nuclear weapons against non-nuclear weapons states that are in compliance with their obligations under the Nonproliferation Treaty.
I also recently traveled to Prague with the President to witness the signing of our New START agreement with Russia. The new agreement will reduce the number of deployed strategic nuclear warheads by our two countries to a level not seen since the 1950s.
All these steps make America and the world safer and more secure.
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