>> well, the way i would say it, david, is they are in the red zone. you know, they are in the last 20 yards. and you can't let them cross that goal line. you can't let them score a touchdown, because that would have unbelievable consequences, grievous consequences, for the peace and security of us all. of the world really. >> what is president obama's line in the sand, the point at which he says to iran don't cross this with your nuclear program or there will be a military consequence? >> david, the president has been very, very clear. our bottom line, if you want to call it a red line, the president's bottom line has been that iran will not acquire a nuclear weapon. and we will take no option off the table to ensure it does not acquire a nuclear weapon, including the military option. but -- >> the prime minister says they are acquiring it. he is talking about how close they are to becoming a nuclear power. >> they are not there yet. and our assessment is, and we share this regularly with our israeli counterparts in the intelligence and defense community, that there is time and space for the pressure we