Anti-violence activist Diane Latiker stands before the memorial for young people lost to violence in Chicago over the last several years. More than 500 stones honor the victims and there are hundreds more that still need to be added. Peter Breslow/NPR hide caption

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Authorities say the drug operation allowed customers to pay at one location, pick up the heroin at another and be back on the expressway within minutes. Scott Olson/Getty Images hide caption

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