invited talks The Battle for ‘Trayvon Martin’: Mapping a Media Ecosystem 24 June 2013Erhardt Graeff Video http://techtv.mit.edu/embeds/25231?size=medium&custom_width=432&external_stylesheet= Slides //www.scribd.com/embeds/163380826/content?start_page=1&view_mode=scroll&access_key=key-123pn82kwnplk7da2535&show_recommendations=true