havana unite state say thursday designate career diplomat lawrence gumbiner new chief cuba embassy center diplomatic crisis due allegations mysterious health attack personnel previous charge affaires scott hamilton leave cuba early month washington order evacuation non-essential staff relatives order remain family gumbiner arrive time heighten tensions old cold war foes unite state formally accuse cuba carry say attack cause hear loss cognitive issue diplomats u.s. president donald trump say last week havana responsible ns0n1md016 interview reuters cuban government officials accuse week slander country nl2n1mz2ch tensions attack involve high-pitched sound come trump say june want partially roll back historic detente unite state cuba order tight restrictions travel trade island yet unveil l3n1jd40j gumbiner lawyer serve past three years deputy chief mission u.s. embassy lima peru accord website u.s. embassy havana deputy permanent representative u.s. mission organization american state previously hold embassy position bogota tel aviv san jose u.s. appoint new top official havana embassy tensions flare