Published: May 2007
Learn More
In Learn More the National Geographic magazine team shares some of its best sources and other information to expand your knowledge of our featured subjects. Special thanks to the Research Division.

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U.S. Customs and Border Protection
Responsible for securing U.S. borders, this agency within the Department of Homeland Security includes the Office of Field Operations, tasked with controlling movement through ports of entry, and the Border Patrol, whose agents watch the vast stretches between official entry points.

International Boundary and Water Commission
This organization, with representatives from the U.S. and Mexico, is the arbiter of border disputes between the two countries.

International Boundary Commission
The northern counterpart to the IBWC, this entity helps clarify border questions relating to the U.S.-Canada border.


Nunez-Neto, Blas. Border Security: The Role of the U.S. Border Patrol. Congressional Research Service, 2005.

Office of Border Patrol. National Border Patrol Strategy. U.S. Customs and Border Protection, 2004.

NGS Resources

Cahill, Tim. "Along the Devil's Highway." National Geographic Adventure (August 2006), 50-57, 90-92, 94.

Clynes, Tom. "National Park War Zone." National Geographic Adventure (February 2003), 42-9, 83-6.

Parfit, Michael. "Tijuana and the Border: Magnet of Opportunity." National Geographic (August 1996), 94-107.

Conniff, Richard. "Tex-Mex Border." National Geographic (February 1996), 44-69.

Morgan, Neil. "San Diego—Where the Two Californias Meet." National Geographic (August 1989), 176-205.

Kramer, Mark. "Life on the Line: U.S.-Mexican Border." National Geographic (June 1985), 720-49.