></i><b>3.2</b> Geographic Visualizations</a><ul>
<li class="chapter" data-level="3.2.1" data-path="case-studies.html"><a href="case-studies.html#spies-in-the-skies"><i class="fa fa-check"></i><b>3.2.1</b> Spies in the Skies</a></li>
<li class="chapter" data-level="3.2.2" data-path="case-studies.html"><a href="case-studies.html#two-centuries-of-u.s.-immigration"><i class="fa fa-check"></i><b>3.2.2</b> Two Centuries of U.S. Immigration</a></li>
<li class="chapter" data-level="3.2.3" data-path="case-studies.h