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Jan 23, 2011 at 20:42 comment added Roy Simpson Thanks Jim, The NASA paper at 50 pages will take some time to read, but it will be interesting to learn why so many attempts failed due unexpected blowups (software failures) in the calculations!
Jan 23, 2011 at 15:32 vote accept Roy Simpson
Jan 23, 2011 at 1:28 history answered Jim Graber CC BY-SA 2.5