Police officer fires blank rounds in high school hallway during active shooter drill: Watch

East High School in Anchorage, Alaska had an active shooter drill this week in which a police officer walked the halls firing blank shots from a handgun, as students stayed inside their classrooms.

During the drill, principal Sam Spinella gave a fake description of the shooter over the intercom, and assistant principal Josh Green walked the halls as the officer was shooting to gauge classrooms’ reactions, KTVA reported. The purpose of the training was to teach students what gunfire would likely sound like in the hallways in a real active shooter situation.