Jack Dorsey, Biz Stone and Evan Williams — a trio of tech entrepreneur friends who shared a dream to connect the world — founded the earth-shattering social media app known as Twitter. CNN Original Series goes inside the creation of this once-radical, groundbreaking tech startup in the brand-new series Twitter: Breaking the Bird. Through firsthand accounts from some of its original founders and early employees, the four-part series dives into the inside story of Twitter’s inception, explosive growth across the world and the dark underbelly of online hate and harassment that emerged. Twitter: Breaking the Bird premieres Sunday, March 9 at 10p ET/PT.