'It's insane': Teacher praises technology that protected students duri… CNN 0 26 09.06 01:13 https://www.youtube.com/watch?v=tmBAn5vot90 + 11 https://www.youtube.com/feeds/videos.xml?channel_id=UCupvZG-5ko_eiXAup… + 6 'It's insane': Teacher praises technology that protected students during shooting