This chapter provides an overview of the New York City Police Department’s (NYPD) policing of terrorism following the attacks on September 11, 2001, derived from an excavation of the NYPD’s history of political policing. From the outset, it is important to recognize that it is a challenging task to keep track of the fluid perceptions, activities, and structures undertaken by the Department since 9/11. Nor can every aspect of its wide-ranging contemporary activities or history be discussed here. The aim is to revisit, what the NYPD did after 9/11. Particular focus will be upon threat and risk perception, organizational structures, and operational activities. A brief account of what empirical historical data suggests about why it countered violent extremism in the manner that it did will finally be considered.