There are aspects of effective airplane security strategy that can be replicated with School, public education and hospital security. Reinforced cockpit doors and secondary barriers are one of the most cost effective and effective measures for deterring and foiling hijackings. There are companies offering military grade security doors that designed to look like ordinary doors. Remo's doors are made out of 18-gauge galvanized steel and bullet-resistant glass. The door weighs 150 pounds and offers a high level of ballistic protection. Security is offered without making the schools feel like a jail.