"The terrorist attacks of 2001 and continued threats of future attacks have directed the attention of Congress to border related issues. This report provides information on the international boundaries that the United States shares with Canada and Mexico. Included is data on land and water boundaries for the northern Canadian border and the southern Mexican border, as well as the international boundaries for the U.S. states that border these countries. Coastline figures for the continental United States, Alaska, Hawaii, the Great Lakes, and extraterritorial areas are also included. For additional information on current border security issues, see CRS [Congressional Research Service] Report RS22026, 'Border Security: Fences Along the U.S. International Border'; CRS Report RL33106, 'Border Security and the Southwest Border: Background, Legislation, and Issues'; CRS Report RL31826, 'Protecting Our Perimeter: 'Border Searches' under the Fourth Amendment'; and CRS Report RL32399, 'Border Security: Inspections Practices, Policies, and Issues'. This report will be updated as needed."
CRS Report for Congress, RS21729