point how that will eventually happen. >> lots of questions that have to be answered. the pentagon will have to answer a lot of these questions. chris lawrence is our man at the pentagon. pentagon planners, pentagon commanders have been saying now for days that they have effectively destroyed libya's air defense system. basically the air force is not flying anymore. so maintaining the no-fly zone over libya doesn't look to be that difficult of an operation right now. the real difficulty will be making sure the ground forces don't endanger civilians. if you believe what the secretary general of nato says, they haven't committed themselves to take on the responsibility, i'm told, by the way, because turkey, among others, a nato ally, doesn't want nato to take over if responsibility of going after na nato's ground forces.