Then, turning about the corner of a wall-like outcropping of granite, we came upon a smooth area of two or three acres before the base of the towering pile of ice and rock that had baffled us for days, and before us beheld the dark and cavernous mouth of a cave.
Canada, Mexico Borders to Be Affected by 2008. Millions of Americans will be required to show passports when they reenter the United States from Canada, Mexico and the Caribbean by 2008 under new rules announced yesterday by the State and Homeland Security departments.
1 Both U.S. and Canadian citizens apply through U.S. Customs and Border Protection. 2  U.S. Passport Card: This U.S. Department of State-issued ID is valid for entry into Canada by land or sea, though not valid for international air travel.3  Enhanced Driver's License (EDL) : EDLs indicate both citizenship and identity. Both U.S. and Canadian citizens apply through U.S. Customs and Border Protection. 2  U.S. Passport Card: This U.S. Department of State-issued ID is valid for entry into Canada by land or sea, though not valid for international air travel. 3  Enhanced Driver's License (EDL) : EDLs indicate both citizenship and identity.