In the mediated digital era, communication is changing fast and eating up ever greater shares of real-world power. Corporate battles and guerrilla wars are fought on Twitter. Facebook is the new Berlin, home to tinkers, tailors, spies and terrorist recruiters. We recognize the power shift instinctively but, in our attempts to understand it, we keep using conceptual and theoretical models that are not changing fast, that are barely changing at all, that are laid over from the past. Journalism remains one of the main sites of communication power, an expanded space where citizens, protesters, PR professionals, tech developers and hackers can directly shape the news. Adrienne Russell reports on media power from one of the most vibrant corners of the journalism field, the corner where journalists and activists from countries around the world cross digital streams and end up updating media practices and strategies. Russell demonstrates the way the relationship between digital journalism and digital activism has shaped coverage of the online civil liberties movement, the Occupy movement, and the climate change movement. Journalism as Activism explores the ways everyday meaning and the material realities of media power are tied to the communication tools and platforms we have access to, the architectures of digital space we navigate, and our ability to master and modify our media environments.