The Northern Kentucky International Airport
(official name, but in reality Cincinnati's major airport)
has been in the news because Amazon made it their in house airline package delivery hub
after KY State gov gave them large subsidy money
and promised to build up the airport just like they did for much longer established UPS sorting facility at the Louisville Airport.

So eBay and USPS have close by
operations/sorting centers/warehouses
for international package delivery?

My fuzzy memory is that years ago when DHS had plans to become equal to Federal Express they had a big operation there.

Historical Tidbit:
On the first international flight from that airport,
KY’s then female governor Martha Layne Collins flew along,
ate her airline meal (unknown to her it had a glass sliver in the food)
started bleeding internally and had to go to a UK Hospital for emergency treatment.

Yes, things can go wrong at that airport.

That land area across the river from Ohio used to be almost totally controlled by organized crime, up to roughly 1965.

I think there is a book roughly titled:
Before there was Las Vegas, It all happened in Newport KY

On the other hand, the founder of the USA version of the Boy Scouts was from that area.