"That's a red line for us!"

"...SECRETARY LEON PANETTA: I think the international strategy here, and this really has been an international strategy to apply sanctions, to apply diplomatic pressure on them, to try to convince Iran that if, you know, they want to do what's right, they need to join the international family of nations and act in a responsible way. I think the pressure of the sanctions, I think the pressure of diplomatic pressures from everywhere -- Europe, United States, elsewhere-- is working to put pressure on them, to make them understand that they cannot continue to do what they're doing. Are they trying to develop a nuclear weapon? No. But we know that they're trying to develop a nuclear capability. And that's what concerns us. And our red line to Iran is do not develop a nuclear weapon. That's a red line for us.BOB SCHIEFFER: Rick Santorum says we should already be making it known to them and the rest of the world that we're planning an attack to take out their nuclear facilities. And that we should let them know about that right now. What about a military reaction right now?SECRETARY LEON PANETTA: Well, you don't take any option off the table. I think that's extremely important. Don't take any option off the table. But the responsible thing to do right now is to keep putting diplomatic and economic pressure on them to force them to do the right thing. And to make sure that they do not make the decision to proceed with the development of a nuclear weapon...."