In part 5 of the MSNBC.com original series on Chicago and life in a city under siege from guns, we meet a group of men called Brothers on the Block — and their counterpart group Sisters on the Street — who fanned out to the city’s most crime-ridden blocks to make a show of force against violence. And a group if a neighborhood known for violence wants to change its image. Produced, shot and edited by Craig Duff with reporter Stephen Franklin.