Primarily, it may seem ridiculous that kinds of weapons that have been around since World War I and not designed to kill could be an evolving ethical or policy dilemma - considering the recent development and production of non-lethal weapons such as laser missiles, blinding weapons, pain rays, sonic weapons, electric weapons, heat rays, disabling malodorants, as well as the use of gases and sprays in both the military and domestic police forces. These weapons may not kill, but they can cause severe pain, physical injuries, and long-term health costs (the latter has not been thoroughly investigated)