This brief reviews the history of foot patrol and the recent, research-driven resurgence of foot patrol in places such as Philadelphia. It summarizes and critiques existing literature on the subject, examining the efficacy of foot patrol. At the time the Philadelphia Foot Patrol Experiment was published, popular opinion about foot patrol was that it might improve community perception of police and reduce fear of crime, but it did not have a concrete crime prevention benefit. The Philadelphia Experiment represented a major examination of this concept, involving over 200 officers in 60 locations over a two-year period, in some of the highest violent crime areas of Philadelphia. The results suggested that a targeted hot spots-oriented foot patrol strategy did contribute to violent crime reduction. Four years later, the lead author of that seminal experiment explores its findings.