Imagine having access to thousands upon tens of thousands of pictures of Chicagoans, and people passing through Chicago that made it into the pages of the Chicago Tribune. And then imagine having to whittle those down to about 150 selections. Which would you choose and what order would you put them in? A new book "Chicago Portraits" is one solution to the challenge. We'll talk with the Tribune Picture Editor Michael Zajakowski about the pictures and the people behind them. 

View a slideshow of the portraits.