match the following to the correct answers. Termed coined by Barnes. - Should be applied to each line of defense. - The front door. - The facade of the building - The cock pit of an airplane - The one area that must be secured or the fight is lost. - A military concept. - first step to securing it is to make it known. - The roof of the facility. - C.E.O.'s office. a. Interior b. Perimeter c. Security in Depth d. Critical Perimeter e. Exterior