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Erythemis simplicicollis
Though they are somewhat similar in appearance, the Great Pondhawk has a longer and more slender abdomen. The abdominal markings are a bit different as well. North Carolina is not a common range for the Great Pondhawk, which is reported in southern Florida and more Southwest US in general (though BugGuide does have a Tennessee record).
I feel pretty confident that this is an adult female Eastern Pondhawk.