VANCE: "The simple fact is that we need to see an affirmative commitment that they will not seek a nuclear weapon, and they will not seek the tools that would enable them to quickly achieve a nuclear weapon!"
"That is the core goal of the President of the United States, and that's what we've tried to achieve through these negotiations."
"Again, their nuclear programs, such as it is, the enrichment facilities that they've had before, they've been destroyed."
"But the simple question is, do we see a fundamental commitment of will for the Iranians not to develop a nuclear weapon, not just now, not just two years from now, but for the long term? We haven't seen that yet. We hope that we will."
