Detailed text transcripts for TV channel - FOXNEWS - 20100730:14:45:00
Astronaut, fox news contributor and planetary scientist and asteroid studier, a cochair on a task force that deals with planetary defense. welcome back. if it hits, what would happen to a major city in world. >> this is one of the larger near earth objects that crosses the earth's orbit and it would cause devastation across a region of continues intent and wipe out the eastern seaboard or the entire south central part of the u.s. but, fortunately this is 170 years in the future and there's lots of time to think... bill: that is a key components, 170 years away? how do you know that? >> well, t...
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