Jack Dorsey is the co-founder of Twitter, a social media platform like none other that allows users to have their voice broadcast to the masses, 140 characters at a time. With Twitter, Dorsey has managed bridge the social gaps that entrepreneurs have been trying to close for years; friends are connecting with far-away friends, companies are finally reaching their customers in a new and unique way, and celebrities are tweeting directly at their fans in every corner of the world. Learn about the man behind the phenomenon in “Jack Dorsey: Co-Founder of Twitter.”