Libyan Rebels Plan Rule, Prepare Final Assault

Libyan rebels say they've secured most of Tripoli and taken a key border crossing to Tunisia. Members of the rebel council say they are moving from Benghazi to Tripoli, where they will set up an interim government to rule Libya into 2012. NPR's Soraya Sarhaddi Nelson brings us the latest from eastern Libya, where rebels are preparing an assault on one of the last strongholds of Moammar Gadhafi, his hometown of Sirte.