bbc, ted koppel, tom ricks, and nbc news white house captions paid for by nbc-universal television good morning. good morning. the president will address the nation about u.s. involvement in libya tomorrow night in response to calls for him to clarify the u.s. mission there. meanwhile, day nine of u.s. and allied air strikes libya as rebel forces advance and manage to take control of the strategic city of ajdabyia in eastern libya, a celebration by rebels there yesterday. opposition forces have now made their way from their stronghold city of benghazi to their port town of brega, overtaking gadhafi forces there, both victories a clearer sign the air strikes are helping rebels advance. let's go live to ajdabia where richard angle joins us this morning for the very latest. richard, what does that advance by the rebels, who are behind you in this shot, say ultimately about the u.s. and allied mission in libya?