Description: For centuries the border between the United States and Mexico has been an area of rich cultural exchange and cooperation, and conversely a source of great conflict and controversy. Historically there have been disputes over border demarcations and resource allocations, including the case of El Chamizal. Today much of the controversy is a result of the mass movement of people across the border. With more than 16 million Mexican immigrants migrating to the United States between 1965 and 2015 (Pew Research Center, 2015), and thousands being turned away at the border each year, intense debates have been sparked. These debates include how the border is regulated, how migrants should be treated, and the impact future border regulations could have on diplomatic relations, as well as on the economy and workforce of the United States. Through the primary sources, documentaries, and reference materials in this collection, one can explore the history of the US-Mexico border and gain insights into the dilemmas faced by migrants trying to cross the border, as well as by policy makers tasked with keeping the border secure.