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The need to secure its borders as part of the war on terror has led to renewed concern in the United States about the scope and cost of illegal immigration. While Standard & Poor's Ratings Services believes that elements of these two issues—national security and illegal immigration—overlap, they're essentially separate problems with their own dynamics.
Below are answers to some of the crucial questions involved in the illegal immigration debate, and its costs and benefits in the most affected states and municipalities along the U.S.-Mexico border.
