(FILES) This file photo taken on December 20, 2016 shows the US Embassy in Ankara, closed for the day after a shooting incident overnight that followed the assassination of the Russian ambassador in the Turkish capital. Turkey on October 9, 2017 urged the United States to reverse a decision to halt the issuing of all regular visas at American consulates in the country, in a row that risks a major crisis. Ankara hit back at the US move -- sparked by the arrest of an Istanbul consulate staffer -- with a similar halt by Turkey's missions in the US. Analysts warned the dispute risked becoming the most serious row between the two NATO allies in decades. / AFP PHOTO / ADEM ALTAN

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