answer:Not quite yet. But soon. For now, you need: “Land/Sea Travel Beginning January 31, 2008, the United States will end the practice of accepting oral declarations of citizenship at the border. * U.S. citizens ages 19 and older must present documentation that proves both identity and citizenship. Identification documents must include a photo, name and date of birth. View the complete list of acceptable documents at CBP.gov. ” ”The Western Hemisphere Travel Initiative (WHTI) is part of the US government’s plan to strengthen border security. The WHTI affects travel to Canada in that it will require all travelers to and from Canada, Mexico, Central and South America, the Caribbean and Bermuda to present a passport to enter or re-enter the United States. Therefore, American visitors to these countries may be refused entry if they do not present a passport, Merchant Mariner Document (MMD), or NEXUS Air Card . June 1, 2009 – The deadline for all Western Hemisphere travel, including land border travel. The specific requirements for the land border crossing will be outlined before this date. Note: June 1, 2009, is the deadline; it’s possible – with proper notice – for the date to move up.”