barbara starr is hearing tonight from her sources of preparations for perhaps a final last stand by the libyan dictator. barbara, when you talk about a last stand, what are your sources telling you? well, they say that there is some indications they believe an assessment, if you will, that kad could be preparing for a last stand that it possibly would of course be in tripoli, his last major strong hold where he has some capability. what they don t know is what would this last stand look like. they re looking at the notion it could be scud missile launches, it could be an all-out military assault on on libyan civilians. they do not know. but that is the major concern at this hour. no firm indications that gadhafi yet is ready to pack up and go, in a maybe he plans one last effort before he finally decides. so it thif that is the worry there any sense that the united states would encourage its nato allies to give him a shove before he can lash out? you bet. the question i