Guest: Chris Carberry. Topics: Mars Society, NASA Administrator, terraforming Mars, life on Mars, commercial missions to Mars, Mars advocacy. Chris Carberry, Executive Director of The Mars Society, was the guest today to discuss the upcoming Mars Society Conference at College Park, MD on the campus of the University of Maryland from July 30-August 2, 2009. To find out more about the conference, please visit www.marssociety.org/portal/c/Conventions/2009.