Kudos to the Washington County Sheriff's Department and to Sergeant Greg Kisor for publishing common-sense advice: Sheriff's Office News http://www.co.washington.or.us/Sheriff/News/upload/The-5-Stages-of-an-Active-Shooter-2.pdf Key Point: "Once the shooter opens fire, immediate action needs to be taken. The Active Shooter will continue to kill until he runs out of victims or ammunition, or is stopped. This suspect is unique, because he is fully dedicated to going for the “top score,” which is measured in kills. The sooner an on- or off-duty officer or citizen intervenes with an effective, efficient act of courage, the fewer casualties there will be. In past incidents, active shooters have been thwarted by police officers, security guards, school teachers and students. One principal recently died successfully stopping an active shooter in a Wisconsin school. There is a risk in doing something, but the greatest risk lies in doing nothing."