Hank gives us the skinny on three plans NASA scientists have come up with to save Earth from an asteroid impact. Hopefully we’ll never have to use any of them.
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References
http://neo.jpl.nasa.gov/1950da/
http://www.nasa.gov/pdf/171331main_NEO_report_march07.pdf
http://www.nasa.gov/pdf/467238main_20100415_NEOObservationsProgram_Johnson.pdf
http://impact.arc.nasa.gov/news_detail.cfm?ID=136
