Newtown, Conn. Sandy Hook Shooting: Will More Guns in the Right Hands Stop Mass Killings? Now, we'll have more in our search for solutions after the tragedy. A different take. Those that argue that the best way to stop mass killings is to have more guns in the right hands at the right time, even in the classroom. It's a controversial debate. And abc's alex perez takes a closer look. Reporter: Since the nightmare at sandy hook, some lawmakers are making the push for a new solution, more guns. Arguing teachers should be armed. You should be able to carry your handgere in this state. Reporter: In tiny wichita, texas, licensed teachers are already allowed to carry guns in the classroom. The superintendent is convinced classroom guns can prevent school shootings. My goal is, if someone comes in to try to hurt my little ones, that they're killed. Reporter: Another company, opsgear, is teaching teachers how to use firearms. Spearheading a course on gun permits and energy survival tactics. The ceo believes educators should have the option to arm themselves. Violence needs violence at times to solve the problem. You have to stop the bad we think firearms is a good alternative. Reporter: But bill bond, who was the principal at the high school in paducah, kentucky, when a 14-year-old shot and killed three students, believes more guns lead to more bloodshed. A lot of innocent people have been killed by the teachers trying to stop something before it started. Reporter: Frustrated, some parents are taking another controversial approach, backpack body armor. Richard brand's company is making bullet-resistant backpacks for schoolchildren. The ordinary-looking child-sized backpacks have a sheet of bullet-resistant body armor sewn into them. Why not offer that protection wherever they are? Reporter: One marine heartbroken by the tragedy at sandy hook, is taking matters into his own hands, standing guard at his daughter's school in nashville. For "good morning america," alex