School where teacher tackled gunman had trained for active shooters

New details Friday morning about the high school teacher who stopped a student gunman in Illinois on Wednesday. Investigators are working through about 200 interviews to figure out the gunman's motive and how he obtained his weapon, but police are already pointing to the incident as an example of the value of preparing teachers to respond to active shooters.According to witnesses, veteran math and P.E. teacher Angela McQueen grabbed the shooter's arm and subdued him after he opened fire in Matto