Now, even as we prosecute two wars, we're also confronting perhaps the greatest danger to the American people, the threat of nuclear weapons. I've 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 44 nations together here in Washington, DC, behind a clear goal: securing all vulnerable nuclear materials around the world in 4 years so that they never fall into the hands of terrorists.