In Chicago, where you live can dictate when you die. The biggest life expectancy gap between neighborhoods is 20 years, from West Garfield Park to the Loop.One of the solutions to closing this gap is playing out in Garfield Park.A son’s mission to turn around his mom’s health has become a community wide effort to help everyone live longer.WBEZ’s Kristen Schorsch takes us on a walk with the Peace Runners 7-7-3.HOST: LANE