A tracing of the $3 billion active shooter preparedness industry in the United States and its effect on students and educators.
HD - 7.0
CAM - 7.7
SD - 6.6
HD - 6.5
CAM - N/A
HD - 7.8
HD - 7.1
HD - 8.4
CAM - 7.1
SD - 3.6
HD - 2.7
HD - 6.4
SD - 5.1
TS - 7.0
HD - N/A
SD - 10.0
CAM - 6.9
HD - 6.9
SD - 5.3
HD - 6.7
HD - 7.4