An hour-long program on the worst school shooting in American history, "Columbine" (April 2001), reveals on 60 Minutes II that authorities ignored telling evidence with which they may have prevented the massacre. Ed Bradley reports.
An hour-long program on the worst school shooting in American history, "Columbine" (April 2001), reveals on 60 Minutes II that authorities ignored telling evidence with which they may have prevented the massacre. Ed Bradley reports.
