Due to a recent policy change, travelers may not be allowed entry into the United States, even with a valid passport.
As part of a greater effort to increase security under the Visa Waiver Program (VWP), which admits citizens of 38 participating countries to the U.S. for business or tourism for up to 90 days without a visa, a policy tweak on April 1 by the U.S. Department of Homeland Security, could leave some travelers on a return flight home.
As of now, travelers entering the country via the WVP are required to have an e-passport, which contains a digital chip with biometric information about its owner and new security features. So, like credit card chips, but for your passport.
The Independent reports some 80,000 British travelers could face refusal to fly unless they update their travel documents, while The Telegraph estimates that the new law could affect millions among the 4 million visitors to the U.S. from Great Britain each year.
To learn more about passports and immigration, visit Heathrow.com.