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The international border between the United States and Mexico runs from San Diego , California , and Tijuana , Baja California , in the west to Matamoros , Tamaulipas , and Brownsville , Texas , in the east. It traverses a variety of terrains, ranging from major urban areas to inhospitable deserts. From the Gulf Of Mexico it follows the course of the Rio Grande (Río Bravo Del Norte) to the border crossing at El Paso , Texas , and Ciudad Juárez , Chihuahua ; westward from that binational conurbation it crosses vast tracts of the Sonoran and Chihuahuan Desert s, the Colorado River Delta , and the northernmost tip of the Baja California Peninsula before reaching the Pacific Ocean . The border's total length is 1,951 Mile s (3,141 Km ), according to figures given by the International Boundary And Water Commission .1 It is the most frequently crossed International Border in the world, with some 350 million people crossing legally every year.2 GEOGRAPHY together with Tijuana create the bi-national San Diego-Tijuana Metropolitan Area .]] ; on the right, Nogales, Sonora ]] from Nogales, Arizona .]] The international border extends over 1,951 miles (3,141 km). The boundary follows the middle of the Rio Grande — according to the 1848 Treaty Of Guadalupe Hidalgo between the two nations, "along the deepest channel" — from its mouth on the Gulf Of Mexico a distance of 1,254 miles (2,019 km) to a point just upstream of El Paso , Texas , and Ciudad Juárez , Chihuahua . It then follows an alignment westward overland and marked by monuments a distance of 533 miles (858 km) to the Colorado River . Thence it follows the middle of that river northward a distance of 24 miles (38 km), and then it again follows an alignment westward overland and marked by monuments a distance of 141 miles (226 km) to the Pacific Ocean . The region along the boundary is characterized by deserts, rugged mountains, abundant sunshine and by two major rivers — the Colorado River and the Rio Grande (Río Bravo del Norte) — which provide life-giving waters to the largely arid but fertile lands along the rivers in both countries. The U.S. State s along the border, from west to east, are: : California , Arizona , New Mexico , and Texas . The Mexican State s are: : Baja California , Sonora , Chihuahua , Coahuila , Nuevo León , and Tamaulipas . In the United States , Texas has the longest stretch of the border of any state, while California has the shortest. In Mexico , Chihuahua has the longest border, while Nuevo León has the shortest. From west to east, the border city twinnings and Border Crossing s include the following:
The total population of the borderlands — defined as those Counties and '' Municipios '' lining the border on either side — stands at some 12 million people. HISTORY With the exception of a small number of minor Rio Grande Border Disputes , since settled, the current course of the border was finalized by the 1848 Treaty Of Guadalupe Hidalgo and the 1853 Gadsden Purchase . Whether the border between Mexico and the breakaway Republic Of Texas followed the Rio Grande or the Nueces River further north was an issue never settled during the existence of that Republic, and the uncertainty was one of the direct causes of the 1846 – 48 Mexican-American War . An earlier agreement, signed during the Mexican War Of Independence by the United States and Imperial Spain , was the 1819 Adams-Onís Treaty , which defined the border between the republic and the colonial empire following the Louisiana Purchase of 1804 . For a detailed history of water-related agreements along the border since the signing of the 1848 Treaty, see International Boundary And Water Commission SECURITY ISSUES and Industrial Waste flows into the U.S. from Mexico as the New River passes from Mexicali , Baja California to Calexico , California.]] The U.S. – Mexico border has the highest number of both legal and illegal crossings of any land border in the world . Besides the closeness of the two countries, differences in living standards on the two sides of border is the primary driving force behind these migratory flows. A large percentage of the border is guarded by large numbers of patrolling agents of the U.S. federal government. For a period of time in the 1990s U.S. Army personnel were stationed along the U.S.-Mexico border to help stem the flow of illegal aliens and drug smugglers. These military units brought their specialized equipment such as FLIR infrared devices and helicopters. In conjunction with the U.S. Border Patrol, they would deploy along the border and, for a brief time, there would be no traffic across that border which was actively watched by "coyotes" paid to assist border crossers. The smugglers and the alien traffickers simply ceased operations over the one hundred mile sections of the border sealed at a time. It was very effective but temporary as the illegal traffic resumed as soon as the military withdrew.http://www.renewamerica.us/columns/zieve/060713 After the September 11, 2001 Attack s the United States looked at the feasibility of placing soldiers along the U.S.-Mexico border as a security measure, but made no mention of the U.S.-Canada Border . Some believe the whole U.S.-Mexico border could be sealed with as few as 100 helicopters equipped with FLIR (forward looking infrared) scopes, and a few hundred men equipped with state of the art sensors, scopes and other electronics. Opposition says this is a violation of '' Posse Comitatus '' although the army patrolled the border for more than 46 years after the passage of the ''Posse Comitatus'' act.http://www.renewamerica.us/columns/zieve/060713 Others, perhaps more realistic, believe that you could never completely close the border but could possibly put a serious dent in illegal cross border traffic with a more robust military presence and a larger, more pro-active Border Patrol. , on the left, and Nogales, Sonora , on the right.]] . The Secure Fence Act Of 2007 authorizes the construction of 700 additional miles of the double chain link and barbed wire fences with light and infrared camera poles.]] at the San Ysidro port of entry.]] Each state in the United States has a Arnold Schwarzenegger initially denied Bush's request to deploy 3,000 National Guard troops to the California- Baja California border.3 Later Schwarzenegger changed his mind after being reassured of reimbursement and replacement if they are needed elsewhere and deployed over 1600 California National Guard troops to the border. It is estimated that over a million people cross the border illegally each year, most {Link without Title} are Mexicans. The rest are labeled "Other Than Mexicans" (OTM), of whom a majority are ) However, the estimates are vague at best, showing only how many apprehensions were made by U.S. immigration authorities and not showing how many people actually attempted to cross the border. The Customs and Border Protection estimates that 500,000 illegal immigrants successfully cross the border into the United States every year. In December 2005, the U.S. House of Representatives voted to build a Separation Barrier along parts of the border. A companion vote in the United States Senate on May 17 , 2006 included a plan to blockade 860 miles (1384 km) of the border with vehicle barriers and triple-layer fencing. Proponents hope a wall running the length of the border will reduce illegal drug smuggling and illegal immigration drastically. Critics point out that this wall is to be built by Halliburton as yet another of President Bush's paybacks to his campaign donors. According to Dr. Douglas Massey of Princeton University (Smoke and Mirrors: U.S. Immigration Policy in the Age of Globalization, Russel Sage, 2001) and other experts, the efforts to curtail illegal immigration by means of security has done nothing but redirect the migration flows into the most desolate and desert areas of the border, thus increasing the mortality rate of illegal immigrants. Furthermore, the security measures prevent the migrants from re-entering Mexico and then returning, as they had done in the past. Instead, they remain in the U.S. for longer periods of time and eventually bring their families with them. President Bush has presented an initiative to reinstate a Guest Worker Program or expand the H-2B program to fill the perceived needs of labor for some areas of the U.S. and, at the same time, has pushed to strengthen the security measures at the border to stop suspected illegal immigrants, terrorists and narcotics dealers from entering the U.S.. WESTERN HEMISPHERE TRAVEL INITIATIVE (WHTI) Recognizing the necessity of tighter border controls as a legacy of 9/11, the Department of Homeland Security (DHS) announced the new rule regarding new identification requirements for U.S. citizens and international travelers entering the country. This final rule and first phase of the Western Hemisphere Travel Initiative establishes three forms of identification -- a valid Passport , NEXUS Air card, or U.S. Coast Guard Merchant Mariner Document (MMD) -- required to enter the US by air.http://www.acte.org/resources/view_article.php?id=105http://www.dhs.gov/xtrvlsec/crossingborders/whtibasics.shtm SEE ALSO
REFERENCES SOURCES :Parts of this article have been adapted from The International Boundary and Water Commission, Its Mission, Organization and Procedures for Solution of Boundary and Water Problems , a public domain publication of the United States Government . |
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