iran is trying to claim credit for all the change taking place in the region. the i were y is that the opposition has called for demonstrations tomorrow to challenge the regime. this is where the tension in the middle east between the old regimes, the elites, are playing out against the people in the streets. and iran is in many ways the most interesting. it introduced islam as a political force and now you're seeing people saying we don't want this form of government anymore. we want change as well. and iran, because of its nuclear program. is the most sensitive country for our long-term interests and so iran will be a place to watch in the next few weeks. >> all right. we will leave it there for now. thank you both very much for the perspective. the events in egypt are creating anxious moments in washington as leaders here consider how the shake-up in the middle east affects vital interests in the region. from egypt's support for u.s. counterterror policy to its