Air travelers from US, Canada, Mexico or Bermuda will be required to show passports in order to enter US when arriving from any part of Western Hemisphere

Starting Tuesday, air travelers with passports from the United States, Canada, Mexico or Bermuda will be required to show those documents in order to enter the United States when arriving from any part of the Western Hemisphere.

Before now, other forms of identification, such as drivers licenses, were accepted.

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The rule change was suggested by the bipartisan commission investigating the September 11, 2001 terrorist attacks, and passed into law by the U.S. Congress.

U.S. officials say next year, Americans traveling in the Western Hemisphere by land or sea could be required to present a valid American passport to get back into the United States.

Some information for this report was provided by AP.