flames. later, rebels were seen in other government tanks. more pictures. this is a burnt out police station seized and burned today by the rebels. take a look and listen. these are syrians. they had taken this photo from the captured police station. they ransacked and they burned. we have struggled to get our crews, get our journalists inside syria. it s been frustrating for us here at cnn and the assad government has put the country under lock and key. with all of that in mind, ivan watson has entered northern syria. we ll speak with him live in a moment. talk to me about the gnificance of fighting in aleppo. it s the economic hub. it s the most populous city. aleppo has been a treating center. there you have a google map of aleppo. here i recognize right away is essentially the most famous land mark, the 13th century citadel. this is the creation. a very old city. by some accounts the oldest inhabited city in the world. we highlighted some of the areas in aleppo wh