This chapter deals with the evolving nature of cyber threats, what the FBI is doing to combat them, and how we can work together to keep them at bay. It first considers cyber threats to national security and counterintelligence intrusions and economic espionage. It then details how the FBI pursues cyber threats through the cyber squads in each of its fifty-six field offices around the country, with more than 1,000 specially trained agents, analysts, and digital forensic examiners. Together, they run complex undercover operations and examine digital evidence; share information with law enforcement and intelligence partners; and teach their counterparts—both at home and abroad—how best to investigate cyber threats. The chapter also highlights the role of the private sector in helping the FBI stem the rising tide of cyber crime and terrorism.