at this point the question is does seery app implode or explode? >> the red line on syria's use of chemical weapons seems to be shifting. why? >> in august, president obama said his calculus would change if the chemical weapons were moved or used. this week we have heard many warnings against using them. it appears that some have been moved and the more worrisome concern is that some may have been mixed into a form that you could use for actually dropping them as a weapon. we do not know quite how urgent that problem is and there have been conflicting reports on that, but you have not heard president obama repeat the warning against using them. i think, in part, that is because they do not have a lot of leverage for getting in around those sites. they depend on circuits. surrogates. >> the think the u.s. is urging each of's leaders to delay a vote -- egypt's leaders to delay a vote? >> he put forward to the people of this constitutional change which would seem quite strong. the irony is that president obama, having contributed to pushing mubarak ou