i ll get a live update from tripoli. in china, vice president joe biden says the u.s. will never default on its debt. i ll have more on what he s saying about the u.s. economy just ahead. and for many members. u.s. military, returning home is just not complete. well, until they get a hero s welcome from man s best friend. their dog. a very special welcome to all the servicemen and women who are watching us right now on the armed forces network. let s get right to it. we begin with libya where moammar gadhafi s government and rebels are offering very different takes on hats goi s w in that country. opposition leaders say they ve taken they are revolution in tripoli. one of gadhafi sons say they are losing every battle. cnn personnel say it seems like some of the most intense yet. before taking the fight into libya s capital, the rebels pushed government forces out of the key city, the oil refinery city of zawiya, about 30 miles from tripoli. cnn filealed this report and