I was thumbing through a book on Vietnam several years ago and saw a reference to CIA Geometric Pattern Camoflauge. There was a postage stamp sized picture that showed a circle and triangle. The chapter was about early American involvment in the war. I did not buy the book at the time and have not been able to find it or even remember the name. I have not been able to find any other references to it. Has anyone else ever heard of this?