President Barack Obama said on Thursday the United States was considering all options on Iran . “No options off the table means I am considering all options,” Obama said at a White House news conference. “What I can say with respect to Iran, I think it is very important to remember,that this administration has systematically imposed the toughest sanctions on Iran ever.” Today Iran is isolated, and the world is unified and applying the toughest sanctions that Iran has ever experienced “Now, Iran understands that they have a choice: They can break that isolation by acting responsibly and forswearing the development of nuclear weapons … or they can continue to operate in a fashion that isolates them from the entire world,” Obama said.