120 years after it was declared dead, the American frontier is expanding.
http://www.nationaljournal.com/120-years-after-it-was-declared-dead-the-american-frontier-is-expanding-20130109 … by @bterris
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120 years after it was declared dead, the American frontier is expanding.
http://www.nationaljournal.com/120-years-after-it-was-declared-dead-the-american-frontier-is-expanding-20130109 … by @bterris