Mankind took another giant step in outer space today. A 220-pound lander that's about the size of a washing machine touched down on a comet 300-million miles from earth. The comet is just two-and-a-half miles wide and this accomplishment has been compared to catching a bullet. Anderson spoke to CNN Aviation Analyst Miles O'Brien and Bill Nye 'The Science Guy' about the more than ten years of planning that went into today's landing.
Anderson Cooper goes beyond the headlines to tell stories from many points of view, so you can make up your own mind about the news. Tune in weeknights at 8 and 10 ET on CNN.
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