Exploring the decades-long conflict in Northern Ireland known as "The Troubles,” "Once Upon a Time in Northern Ireland" tells the story through the intimate testimony of ordinary men, women, and children who were drawn—both willingly and unwillingly—into the bitter clashes that rocked the nation and who are still struggling to hold on to a fragile peace today. "Once Upon a Time in Northern Ireland" premieres Monday, August 28 at 9/8c. | PBS