This timely and important work takes a critical look at the shifting role of police, who are becoming increasingly responsible for handling terrorism threats on top of their regular responsibilities. With an unprecedented empirical study, the authors of this book examine whether this increased focus on security-related threats may come at the expense of addressing “classic” police responsibilities, such as fighting crime and dealing with local, day-to-day community problems. They also examine whether this shift has had a detrimental effect on police-community relationships and perceptions of police legitimacy, as their role changes from “service” to “suspicion.” Through a four-year, multi-method study specifically focused on the Israel National Police, the authors of this work have examined the effects of this shifting role on a number of key areas of policing concern, namely: police effectiveness at fighting crime and police legitimacy, drawing conclusions applicable to any democratic police force. The results of the study provide a number of concrete recommendations for maintaining effectiveness and community relationships of the police, with increasing responsibilities, challenges, and limited resources. This work will be of interest for researchers in criminology and criminal justice, particularly with a focus on police studies and counter-terrorism; police administrators; and researchers in related disciplines, such as sociology and public administration.