a senate bill on policing reforms may be hitting a stumbling block. the top republican negotiator saying today that both sides are far apart on a number of key issues. this come against the backdrop of surging crime in america. a tracking group known as gun violence archive reports that more than 8,400 people have died from gun violence so far this year. and there have been more than 240 mass shootings. a lot to discuss now with bill bratton, the former new york city police commissioner. he's also the author "the profession." i'm so glad to have him on tonight. commissioner, thank you for joining us. >> great to be with you. >> commissioner, just this past weekend, at least 16 people died of gun violence in the u.s. what makes this surge in crime different from past ones? >> well, i think it's a reflection of the growing number of guns in our society.