Technology and social media are fundamentally transforming communication and policing in the 21st century. On the one hand, social media’s prevalence is creating new concerns for security agencies dealing in the complex world of extremist ideology. On the other hand, Facebook and Twitter equip law enforcement agencies with the opportunity to tell their own stories about successful arrests and community outreach without needing to communicate through the news media. Either way, law enforcement must be educated about the opportunities and the challenges associated with these new components of policing.