| http://www.w3.org/ns/prov#value | - efore you travel.???British Airways also issued an update for passengers flying from Britain to the U.S. ???Customers may be asked to turn on any electronic or battery powered devices such as telephones, tablets, e-books and laptops in front of security teams and/or demonstrate the item???s functionality,??? the update said. ???If, when asked to do so, you are unable to demonstrate that your devic
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