As a retired Phoenix Police supervisor and a veteran of the Vietnam War, it’s sad that this has to be done in our country. We should use retired police officers. And there should be two at every school. They should be armed and have access to any weapons needed for the threat at the time. The schools need to be on lock out to entrance after school starts with double bullet proof doors that are surrounded by bulletproof glass. These doors and any other door in the school can be opened by key cards. This will come at a high price . Above all we need to teach our children to respect each other and to speak up when they see the danger another student is showing. Political correctness and the threats of lawsuits need to be put aside for protection of the majority.