Singapore offers world's most powerful passport1 position in the Henley Passport Index, which measures global travel freedom in terms of how much visa-free and visa-on-demand access to the world different citizens enjoy.
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A valid passport book is required to enter Mexico by air, and those attempting to enter at an airport with a U.S. passport card only may be denied admission.
But now, according to the most recent ranking, based on exclusive and official data from the International Air Transport Association (IATA), Singapore has pipped Japan to the post and become the most powerful passport.