WATCH: Video shows inside Florida high school classroom as the shooting unfolded. https://t.co/Llzz7VjwCd pic.twitter.com/wZ8UA5cP9D— NBC News (@NBCNews) February 14, 2018
WATCH: Video shows inside Florida high school classroom as the shooting unfolded. https://t.co/Llzz7VjwCd pic.twitter.com/wZ8UA5cP9D