The Instigators

In 2008, a small band of political activists in Egypt led by a young engineer named Ahmed Maher began organizing on Facebook under the moniker April 6 Youth. Dodging the secret police both online and off, they built a Web page into a movement. Then, in January 2011, they helped architect a final showdown with the country's dictator. David Wolman unspools the riveting behind-the-scenes story of these daring activists and how they planted the digital seeds of a revolution.