People in make-believe space suits are exploring the Utah desert as if they really were 240 million miles away. “We needed a place on earth where we could practice for Mars. There’s no point going to Mars unless you can do something useful when you get there,” explained Robert Zubrin of the Mars Society. In a corner of some of this planet’s more forbidding landscape, the privately funded Mars Desert Research Station is a kind of outer-space camp for members of the Mars Society. At the camp, self-described space junkies spend two weeks simulating life on Mars, reports CBS News Correspondent Bob McNamara. Among them are vacationing geologists and NASA computer scientists. Most of them are grounded in serious research and all want to go to Mars.