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Overcome with emotion. i was welling up with tears when i spoke with scott. >> rachel crane, great to have you there this morning. weve been talked about the storied history of nasa. the moon missions were originally intended to be a steppingstone for other manned missions deeper into space. >> cnns paul vercammen went to nasas propulsion laboratory, and he took a look at what is next for nasa, where do we go from here. >> reporter: 1957, the russians launched the first satellite into space. and...