Letters submitted by BDN readers are verified by BDN Opinion Page staff. Send your letters to letters@bangordailynews.com. School children have been killed before with no solution found to keep killers from getting the guns. Politicians provide talk saying that we need more money, better laws, gun control, etc. If we can’t stop killers from getting guns, our schools need to be “hardened” with a single entry of double doors, and all other doors locked and monitored to alert the school authorities and local police when doors are open.