What we've seen at least since 1979 is Iran making constant, calculated decisions that allow it to preserve the regime, to expand their influence where they can, to be opportunistic, to create what they view as hedges against potential Israeli attack in the form of Hezbollah and other proxies in the region.
When al-Qaeda was on the run from Afghanistan crossing through Iran, some were arrested and they are imprisoned. Some of them are charged with some actions in Iran.
The biggest problems with Iran in the region are not due to the size of their resources, but due to the fact that they've been more effective in supporting proxies and stirring up dissension and conflict in the region than America or our allies have been in stopping those activities.
The United States is imposing sanctions on individuals and companies working to advance Iran's ballistic missile program, and we are going to remain vigilant about it. We're not going to waver in the defense of our security or that of our allies and partners.
When I came into office, the world was divided. Iran was resurgent. Iran is at its weakest point, economically, strategically, militarily, then since - then in many years. And we are going to continue to keep the pressure on to make sure that they do not get a nuclear weapon. That's in America's national interest and that will be the case so long as I'm president.
We did not treat the Americans badly. They left Iran in a relaxed mood. The embassy was active here after the revolution. We didn't have any problem with them. They started it.
In Canada, the U.S. and most of Europe it may be easy to take political stands, this is something for which you can be forced to pay with your life, or your freedom, in many other parts of the world, from Iran to Russia to Pakistan to China.
As long as Iran's aggressive policies continue, it's going to be bad for the region. Iran has to decide whether it wants a revolution or a nation-state.
That may prevent us from getting a deal done, It is there to be had. Whether ultimately Iran can seize that opportunity - we will have to wait and see, but it is not for lack of trying on our part.
Over more than a decade, Iran had moved ahead with its nuclear program. And before the deal, it had installed nearly 20,000 centrifuges that could enrich uranium for a nuclear bomb.