Visa Waiver Program | U.S. Customs and Border Protection
https://www.cbp.gov/travel/international-visitors/visa-waiver-program
The Visa Waiver Program (VWP), administered by the Department of Homeland Security (DHS) in consultation with the State Department, permits citizens of 41 countries to travel to the United States for business or tourism for stays of up to 90 days without a visa.
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