A resident as well as citizen of a foreign country who try to find to enter the United States generally must first obtain a U.S. visa, which is to be found in the traveller’s passport. So we need to know what a traveller’s passport is. We can say it’s a travel paper which is to be issued by the traveller’s country of citizenship. But some people meet the requirements to travel for some specific countries without visa as they are eligible for visa- free travel to the United States.
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