<p>The westward expansion of the United States in the 19th century added millions of acres to our territory.  Thomas Jefferson stated "The fertility of the country, its climate and extent, promise in due season important aids to our treasury, an ample provision for our posterity, and a wide-spread field for the blessings of freedom."  Today, Americans still heavily depend on many resources and industries in the west.<br /></p> <p>However, with triumph often comes elements of tragedy.  Learn more about the black-footed ferret's brush with extinction through videos, images, and news articles.<br /></p> <p>#NHD2019 #NHD</p>