And we will continue to work with the international community to usher in the future the Syrian people deserve, a future free of dictatorship, terror, and fear. As we speak, American diplomacy is supporting Israelis and Palestinians as they engage in the difficult but necessary talks to end the conflict there, to achieve dignity and an independent state for Palestinians and lasting peace and security for the State of Israel, a Jewish state that knows America will always be at their side. And it is American diplomacy, backed by pressure, that has halted the progress of Iran's nuclear program and rolled back parts of that program for the very first time in a decade. As we gather here tonight, Iran has begun to eliminate its stockpile of higher levels of enriched uranium. It's not installing advanced centrifuges. Unprecedented inspections help the world verify every day that Iran is not building a bomb. And with our allies and partners, we're engaged in negotiations to see if we can peacefully achieve a goal we all share: preventing Iran from obtaining a nuclear weapon. These negotiations will be difficult. They may not succeed. We are clear eyed about Iran's support for terrorist organizations like Hizballah, which threatens our allies. And we're clear about the mistrust between our nations, mistrust that cannot be wished away. But these negotiations don't rely on trust. Any long-term deal we agree to must be based on verifiable action that convinces us and the international community that Iran is not building a nuclear bomb. If John F. Kennedy and Ronald Reagan could negotiate with the Soviet Union, then surely a strong and confident America can negotiate with less powerful adversaries today. The sanctions that we put in place helped make this opportunity possible. But let me be clear: If this Congress sends me a new sanctions bill now that threatens to derail these talks, I will veto it. For the sake of our national security, we must give diplomacy a chance to succeed. If Iran's leaders do not seize this opportunity, then I will be the first to call for more sanctions and stand ready to exercise all options to make sure Iran does not build a nuclear weapon. But if Iran's leaders do seize the chance--and we'll know soon enough-- then Iran could take an important step to rejoin the community of nations, and we will have resolved one of the leading security challenges of our time without the risks of war. Now, finally, let's remember that our leadership is defined not just by our defense against threats, but by the enormous opportunities to do good and promote understanding around the globe: to forge greater cooperation, to expand new markets, to free people from fear and want. And no one is better positioned to take advantage of those opportunities than America.