"(CBS News) CHICAGO - Chicago is in the grips of a deadly gang war. At least 275 people have been killed in the city so far this year and many more have been shot, many of them innocent bystanders to the gang violence. Among the latest victims were 12- and 13-year-old girls shot Tuesday night. They survived.

Sgt. Matt Little leads one of the teams in Chicago's Gang Enforcement Unit. There are about 200 such officers in the city-- versus 100,000 gang members."

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