A target sheet hangs at a shooting range July 22 in Aurora, Colorado.
How police train for active shooter response
"Active shooter" is one of the worst calls police can get. CNN gets an exclusive look at the Advanced Law Enforcement Rapid Response Training Program, which trains police for real-life active shooter scenarios.
02:20 - Source: CNN
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A target sheet hangs at a shooting range July 22 in Aurora, Colorado.
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