October 31, 2011 We begin the week with photographer Mariana Cook, responsible for a new book titled "Stone Walls: Personal Boundaries." She traveled all over the world to photograph stone walls constructed without mortar - some of them thousands of years old. Audio Player Your browser does not support the audio element. 00:0000:0000:00Use Up/Down Arrow keys to increase or decrease volume. The Morning Show - 10/31/11