"Every airport has a unique three-letter IATA (International Air Travel Association) code. Some make sense if you know the city or the name of the airport and others, well, what the heck?"
Check out the beautiful, engaging website, Airport Codes, that shows you why each airport has the code it has; each explainer is accompanied by an often striking photo of the airport.
A $5 Panera gift card to the first person who emails me why on earth Columbus, Ohio, has the airport code CMH.
And for more on aviation law, check out one of the dozens of books we have on the subject or this Aviation Law Research Guide.