I am a Vietnamese and aGreen card holder in US for more than 20 years, I plan to fly to Vancouver, Canada?

Q: What is the Travel document require to enter Canada and back to US ( I do not have a passport) the travel time is less than a week. I look @ US department of state website there is not require any other doccument just your Green-card only. I just want to make sure is this true. Thanks

A: if you are flying in to canada you need a passport if you drive just ID is enough til 2008

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