From Italy, Bruce Betts gives background and information at the start of the Planetary Defense Conference, which addresses the asteroid threat. Bruce summarizes steps to prevent asteroid impact.
from Planetary Society Blog http://www.planetary.org/blogs/bruce-betts/2015/20150413-planetary-defense-conference.html
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from Planetary Society Blog http://www.planetary.org/blogs/bruce-betts/2015/20150413-planetary-defense-conference.html
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