What kind of flying insect is this? It kinda resembles a dragonfly but it had what looked like a stinger on the end of it's tail. It was found in Franklin, Ohio.
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... it kinda resembles a dragonfly ...
That's because it is a dragonfly! This is a female Tramea onusta, most commonly known as a "Red Saddlebag", which comes from the red coloration found at the lower regions of the dragonfly's hindwings.
... it had what looked like a stinger on the end of it's tail.
That's exactly correct! Female dragonflies have what look to be a stinger, however, they're used for laying eggs instead (and not as a weapon). (source, p.5)