Even as we prosecute two wars, we are also confronting perhaps the greatest danger to the American people the threat of nuclear weapons. I have embraced the vision of John F. Kennedy and Ronald Reagan through a strategy that reverses the spread of these weapons, and seeks a world without them. To reduce our stockpiles and launchers, while ensuring our deterrent, the United States and Russia are completing negotiations on the farthest-reaching arms control treaty in nearly two decades. And at April's Nuclear Security Summit, we will bring forty-four nations together behind a clear goal: securing all vulnerable nuclear materials around the world in four years, so that they never fall into the hands of terrorists. These diplomatic efforts have also strengthened our hand in dealing with those nations that insist on violating international agreements in pursuit of these weapons. That is why North Korea now faces increased isolation, and stronger sanctions sanctions that are being vigorously enforced. That is why the international community is more united, and the Islamic Republic of Iran is more isolated. And as Iran's leaders continue to ignore their obligations, there should be no doubt: they, too, will face growing consequences.
That is the leadership that we are providing -- engagement that advances the common security and prosperity of all people. We are working through the G-20 to sustain a lasting global recovery. We are working with Muslim communities around the world to promote science, education and innovation. We have gone from a bystander to a leader in the fight against climate change. We are helping developing countries to feed themselves, and continuing the fight against HIV/AIDS. And we are launching a new initiative that will give us the capacity to respond faster and more effectively to bio-terrorism or an infectious disease a plan that will counter threats at home, and strengthen public health abroad.
As we have for over sixty years, America takes these actions because our destiny is connected to those beyond our shores. But we also do it because it is right. That is why, as we meet here tonight, over 10,000 Americans are working with many nations to help the people of Haiti recover and rebuild. That is why we stand with the girl who yearns to go to school in Afghanistan; we support the human rights of the women marching through the streets of Iran; and we advocate for the young man denied a job by corruption in Guinea