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Uploaded on Nov 20, 2008
Since the attacks of September 11th, the United States has tried to build new border defenses to keep out terrorists without stifling the flow of people and ideas from abroad. But somewhere along the way, immigration enforcement become the main way for the U.S. to pursue counterterrorism at home. Council on Foreign Relations fellow and author of The Closing of the American Border Edward Alden visits Zócalo to explain how it happened, and to assess the real effects heightened national security measures on both Americans and the world at large.