Loeffler says: “A wall is fear in three dimensions.”

“A wall is so primitive,” said Jane Loeffler, an architectural historian who has studied the fortification of U.S. embassies after the 1983 bombing of the U.S. Embassy in Lebanon. “You can dig under it, go over it, catapult yourself over it. A wall is more symbolic than a real defense. A wall is fear in three dimensions.”