Panelists discuss “The U.S. Frontier in its Global Contexts” at the conference “The Significance of the Frontier in an Age of Transnational History,” held at The Huntington Library on Feb. 25, 2012. On the panel were Brian Delay, University of California, Berkeley, History; Jay Gitlin, Yale University, Howard R. Lamar Center for the Study of Frontiers and Borders; David Igler, University of California, Irvine; Patricia Nelson Limerick, University of Colorado at Boulder, Center of the American West; David Wrobel, University of Oklahoma, History; William Deverell, University of Southern California, History.