As mass shootings became commonplace, attempts to hold gun makers accountable kept hitting the same roadblock — until now. We look at a lawsuit that could transform the firearms industry. Guests: Natalie Kitroeff, a business reporter for The New York Times, spoke with David Wheeler, whose 6-year-old son, Ben, died in the massacre at Sandy Hook Elementary School; and Sheryl Gay Stolberg, who covers Congress for The New York Times. For more information on today’s episode, visit nytimes.com/thedaily.  Background reading: A Connecticut Supreme Court ruling has created a potential opening for Sandy Hook families to maneuver around the gun industry’s legal shield and hold companies liable for the attack.The families are hoping to replicate a tactic used in lawsuits against cigarette manufacturers.