In this photo taken Aug. 14, 2015, a U.S. flag flies at the U.S. embassy in Havana, Cuba. American diplomats who served in Cuba have been diagnosed with mild traumatic brain injury following mysterious, unexplained attacks on their health, the union that represents U.S. diplomats said Friday, in the most detailed account to date of the growing list of symptoms. (AP Photo/Desmond Boylan)
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