@CNN: This high school in Anchorage, Alaska, is using the sound of real gunfire to prepare students for active shooters https://t.co/Jzhuud6Smd https://t.co/Nvcpp3Hbhq

@CNN: This high school in Anchorage, Alaska, is using the sound of real gunfire to prepare students for active shooters https://t.co/Jzhuud6Smd https://t.co/Nvcpp3Hbhq