opposition leaders say they've successfully pushed gadhafi forces out of the city's center. they've also regained the critical port there. libya's government admits its soldiers are retreating but vows tribal fighters will remain. a rebel spokesman says gadhafi is simply trying to disguise his army's defeat there. events in the middle east have been so explosive and fast moving it's sometimes hard to step back and take in the big picture. cnn's senior international correspondent nic robertson has been in the thick of all these stories as they have swept across the arab world. he was there for the first al allied coalition fighting and he was also there -- take a look at this. this is a camera inside the hotel virtually annihilated by moammar gadhafi forces. but our nick rob e robertson, i with him about close calls to