Oklahoma high school principal takes down gunman

New video of the heartstoppping moments a gunman walks into Paul's Valley High School in Oklahoma. You can see a pistol in hand. But watch what unfolds next.Principal Kirk Moore in the blue shirt emerging from another door and tackling the suspect identified by police as 20-year-old Victor Hawkins, a former student of the school. Just feet away, you can see a young person slip out during Moore's fast acting efforts. Authorities say the principal was shot in the chaos but managed to get the suspect to drop t ...