| http://www.w3.org/ns/prov#value | - In addition, travelers may be required to submit a request for permission to travel to locations or participate in programs that pose a specific health, safety, or security concern as indicated by authorities other than the U.S. Department of State, such as the Center for Disease Control (CDC), World Health Organization (WHO), non-U.S. government authorities (e.g., Australian or Canadian authoriti
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