Recently we spoke with David Kennedy about combating gang violence. Kennedy founded a project called Operation Ceasefire that helped reduce gang violence nationally. Today, we're speaking with a police officer who has also had success in reducing gang-related crime. Los Angeles police chief and former NYPD commissioner Bill Bratton joins us to share his experiences. During his tenure heading the two largest police departments in the U.S., Bratton has presided over precipitous drops in crime.