Notes: Terrorists take advantage of those very ideals that Americans value: an open society and freedom. Because of this, they've been able to live in our midst unrecognized as the enemy. "The Invaders" was a 1960s television series. In it architect David Vincent, played by Roy Thinnes, had learned that alien invaders were living among us, undetectable from human beings. Frames 2 and 3 in the above strip depict Thinnes as he looked in that role. 10.28.01