Space and health, seemingly disconnected, join to provide important lessons about the nation. (In violation of a longtime columnar stricture against the first-person singular - in this age of the rat-trap of me, a stricture violated in columns and blogs and on television every day before breakfast - today's column includes some personal references.) Many in their 50s and older recall vividly where they were when Neil Armstrong first walked on the moon. My wife and I and our 6-month-old son spent the night at a vacationing neighbor's house that had a color TV and ours didn't. Because of the...