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Kirsty Wigglesworth/APHeathrow Airport said it was "fully operational" on Saturday, after an almost daylong closure sparked by an electrical substation fire. But airlines warned that severe disruption will last for days. -
John MacDougall/AFP via Getty ImagesThe advisories come after some citizens from European countries and Canada have been detained and deported by immigration officials while traveling to the United States.
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As with Europe, the Trump administration is sending conflicting signals to America's long-standing allies in Asia, with whom the U.S. has deep-rooted security agreements that date back to the 1950s.
