The power of art to change people and communities can be breathtaking. This week we talk with Johann Zietsman who has orchestrated powerful art experiences internationally from South Africa to Mesa, Arizona. Johann is executive director of the Mesa Arts Center.

We also find out which cities are best prepared for $4 a gallon gas and which are not when we visit with Warren Karlenzig of Common Current. Warren is author of How Green Is Your City. Warren has worked with national governments, the State of California, major cities, and the world's largest corporations developing policy and strategy for 20 years.