America’s space program is going no place fast. As shuttle astronauts fiddle with pieces of a megabillion-dollar International Space Station built for six, exactly where the U.S. space enterprise is taking the ground-bound, tax-paying public-at-large remains unknown. Seeing red is Robert Zubrin, President of the Mars Society, based near Denver, Colorado. Not only is the planet Mars an ideal spot for a new branch of civilization, Zubrin said, a human mission to that neighboring world speaks to what the human venture in space is about.