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 Global Citizens, Marketers Rely on Social Media After Japanese Quake Businesses, Agencies in the Country Check in, World Turns to Twitter for News, Google Pitches in to Help Locate People By Ad Age Staff, Published on March 11, 2011 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. Register Now Already a member? Log in.