syria have launched one of their most daring assaults, seizing a major city. this time saddam hussein's hometown of tikrit, the city overrun just a day after insurgents took control of iraq's second biggest city, mosul. hundreds of thousands of residents are running from their homes. police have been laying down their arms, trying to change into civilian clothes, all in an effort to escape the worst carnage to strike iraq in nearly a decade. cnn's chief national security correspondent jim sciutto is "outfront." jim, this is stunning to imagine when you think about the time, the money, the lives that were spent on iraq, iraqi and american. where do things stand tonight? >> it is stunning. it's alarming, particularly how quickly it has straighted. these are major cities. mosul first, tikrit, saddam hussein's hometown. and they're getting closer to the capitol baghdad. and one of the big disappointments for u.s. officials, iraqi officials is that the iraqi security forces