Pearl Harbor Attack--my home port during the Vietnam War. Many relics and reminders of the Pearl Harbor attack were still there in Nearby Hickam Airfield still had holes in the walls of offices and barracks as a reminder to never let our guard down.
Think of parenting, teaching, sports, etc. and the value of a mentor is indisputable. Organizations and businesses that are skillful in implementing a mentoring culture perform better and have happier members and employees.