On this Independence Day weekend, we’re taking a look back at the tragic July 4 mass shooting that claimed seven lives and injured nearly 50 others at suburban Chicago parade in 2022. How have that mass shooting, and the numerous violent events that have made headlines over the past decades, changed the way we celebrate? As our nation celebrates our 250th anniversary, are we finding it harder to trust each other? Featuring audio from WBBM Newsradio in Chicago and KCBS Radio in San Francisco.