i'm kimberly rankin for cbs news. >> kimberly, thanks. now here's chris. >> erica, thank you.rs and at least 15 iraqis were killed in a wave of weekend bombings, mostly in baghdad. the violence comes as the last british troops withdraw from iraq. and the u.s., with -- and with the u.s. set to pull out of the rest of its forces by the end of the year. cbs news chief foreign affairs correspondent lara logan joins us now from washington with an update on this. lara, good morning to you. >> good morning, chris. well, it appears this has been a deadly weekend in iraq, and the question looming over everybody is, is how the country will hold together after u.s. forces pull out. >> what does it say about the stability there in iraq, at present, with this increased violence, often targeting police forces? >> that is very fragile. i mean, it's not a surprise the police forces were targeted, as they're the ones out there on the street. they're easy targets, in a sense, and usually not as well disciplined or well trained as the army. but what this really points to is the fact that the sur