You’ve read all of your free items this month. To register, get added benefits and unlimited access to articles, Become a Member. Already a Member? Sign in. Advertising Age Article Abstract Nike's 'Just Do It' Slogan Turns 20 Epic 'Courage' Campaign Aims to Recharge Inspirational Message By Natalie Zmuda, Published on July 17, 2008 1 Want more Access, Content & Connections? Upgrade to Membership. We are glad you are enjoying Advertising Age. To get uninterrupted access and additional benefits, become a member today. Become a Member Already a member? Log in.