We should go to Mars, because discover more about the planet. We should do it first hand, not from robots.
Besides, it's creates jobs, we find out sceince stuff and we go to a real planet. We have to discover. The cost is worth it. We can use the space station as a spaceport for ships going to the moon or to mars.
"For this I am sure, that man has learned that space in his to explore, and man will continue explore, to the moon and beyond" Dr. George Low, Deputy NASA adminstrator.