US Secretary of State Hillary Clinton speaks at the Conference to promote the entry into force of the CTBT

She said:

"The Comprehensive Nuclear-Test-Ban Treaty is an integral part of our non-proliferation and arms control agenda, and we will work in the months ahead both to seek the advice and consent of the United States Senate to ratify the treaty, and to secure ratification by others so that the treaty can enter into force.
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As we work with the Senate to ratify the CTBT, we will encourage other countries to play their part—including the eight remaining Annex 2 countries.  Those who haven’t signed should sign. Those, like us, who haven’t ratified, should ratify. And the 150 countries that have already progressed to ratification can use this opportunity to continue preparations for CTBT implementation.  
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More than eighty percent of the monitoring stations that will constitute the International Monitoring System have already been installed and we urge all host countries to ensure that the data from these installations are reported to the International Data Center.  In the coming months, we will look for new ways to support the monitoring system —including upgrades to the system and other verification capabilities of the CTBT—with the help of all nations, including those who have yet to ratify.

…after a ten year absence from this conference, America stands ready to renew its leadership role in the non-proliferation regime.

-------…after a ten year absence from this conference, America stands ready to renew its leadership role in the non-proliferation regime. As President Obama said yesterday, we have a shared responsibility for a global response to global challenges. We come to this conference with an optimistic spirit that all parties can make a contribution towards a world without nuclear weapons.  That is the promise of the CTBT, and it is why we are rededicating ourselves to this effort." Read the United States' Statement here (PDF)