- Bureau of Consular Affairs
 - Official page of the U.S. Bureau of Consular Affairs. Includes information on travel warnings, passports, travel alerts, and more. - Passport Services@
- Travel Warnings
- Visas
- Official U.S. Department of State site for information about visa policy and procedures. Has links for temporary visitors and immigrants to the U.S.
- Western Hemisphere Travel Initiative
- Requires U.S. and Canadian travellers to present a passport or other document that denotes identity and citizenship when entering the U.S. Site lists documents acceptable by air, land, or sea and how to get them.
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