"There is insufficient data in the literature to determine whether the presence of metal detectors in schools reduces the risk of violent behavior among students, and some research suggests that the presence of metal detectors may detrimentally impact student perceptions of safety"
- Hankin A, Hertz M, Simon T. Impacts of metal detector use in schools: insights from 15 years of research. J Sch Health. 2011; 81: 100-106.