In 1984, President Ronald Reagan designated the third Sunday in July as National Ice Cream Day. It’s a special day here in Massachusetts, where we double-dip every day of the year, even in freezing temperatures. And it was here in Greater Boston where ice cream innovators help catapult ice cream from a mass-produced product to a handmade, artisanal specialty. Our guests talk to us about the ice cream revolution of "smush-ins," global culinary trends and even savory ice cream, and give us their take on why they think New England loves ice cream so much. Guests: Amy Ettinger, author of “Sweet Spot: An Ice Cream Binge Across America"; Judy Herrell, owner of Herrell’s Ice Cream; and Gus Rancatore, owner of Toscanini’s Ice Cream in Central Square in Cambridge, Massachusetts.