Since June 1, 2009 it is required to present a U.S. Passport at every land port for entry, sea and airport of the continental United States in order to re-enter the United States. For more information, please visit the following web site: http://www.getyouhome.gov/html/eng_map.html

For detailed information in English and Spanish, please visit the National Institute for Migration office - http://www.inm.gob.mx/index.php/page/pagina_principal/en.html

To find the nearest U.S. Consulate office, please visit the U.S. Department for State office - http://www.state.gov/p/wha/ci/mx/c3063.htm

To find the nearest Mexican Consulate office in the U.S., please visit Mexico Secretaria de Relaciones Exteriores office -http://sre.gob.mx/index.php/representaciones/consulados-de-mexico-en-el-exterior

For detailed information on how to relocate and/or expand into Arizona, please visit the Arizona Commerce Authority: http://www.azcommerce.com/BusAsst/Expand/

For a thorough guide on how to do business in Mexico, please visit the Secretaria de Economia: http://www.promexico.gob.mx

For complete details on SENTRI, please visit: http://www.cbp.gov/xp/cgov/travel/trusted_traveler/sentri/sentri.xml

For complete details on FAST, please visit: http://www.cbp.gov/xp/cgov/trade/cargo_security/ctpat/fast/