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A small team at Martin Marietta drew up a daring plan. Deemed "Mars Direct," it sharply cut costs and planned to send a group of American astronauts to the Red Planet within ten years. Now, with the revival of the call for a human space exploration initiative, the "Mars Direct" plan falls at the center of the debate: can Americans reach the Red Planet in our time?

Added by Upcoming Robot on August 31, 2009