WBEZ brings you fact-based news and information. Sign up for our newsletters to stay up to date on the stories that matter.We’re on the cusp of the July 4th holiday weekend and along with the bbq’s and fireworks is, unfortunately, the specter of increased gun violence. We hear about an effort that aims to stem that violence in certain Chicago neighborhoods. Plus the important and often overlooked role Chicago played in the birth of American movie-making…detailed in the book Flickering Empire: How Chicago Invented the U-S Film Industry. Also mariachi music from a L.A. band that normally plays punk, and the latest changes for our NHL Stanley Cup Champion Blackhawks.