Canada–United States border

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There are two international borders between Canada and the United States: Canada's border with the northern tier of the contiguous United States to its south (6,416 kilometers or 3,987 miles), and with the U.S. state of Alaska to its northwest (2,475 kilometers or 1,538 miles). It is the longest international border in the world by total length, and the section between Canada and the contiguous United States is the second-longest continuous international border in the world after the Kazakhstan–Russia border. The boundary (including boundaries on the Pacific coast, Great Lakes, and Atlantic coasts) is 8,891 kilometers (5,525 mi) long. The bi-national International Boundary Commission deals with matters relating to marking and maintaining the boundary, and the International Joint Commission deals with issues concerning boundary waters. The agencies responsible for facilitating legal passage through the international boundary are the Canada Border Services Agency (CBSA) and U.S. Customs and...

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