The Global Engagement Center is an interagency entity, housed at the State Department, which is charged with coordinating U.S. counterterrorism messaging to foreign audiences. It was established pursuant to Executive Order 13721, signed on March 14, 2016, which states that the Center “shall lead the coordination, integration, and synchronization of Government-wide communications activities directed at foreign audiences abroad in order to counter the messaging and diminish the influence of international terrorist organizations,” such as ISIL. The Capstone team was asked to identify the most effective strategies in influencing behavior through online communications. They will analyze best-practices in online communication for behavior change from non-counterterrorism related fields such as marketing, public health, sociology, youth anti-gang, anti-bullying, anti-suicide programs, etc. and explore how they can be applied to programs which seek to intervene into the process or radicalization towards violence.