Okay. Lets look into marker 10. This post caught my eye. There are six posts with [10] in them. 334, 364, 365, 453, 455, 2709. Looking into ATL and concourse F I found this.

https://www.travelandleisure.com/airlines-airports/atlanta-airport-map-terminal-guide

The new complex includes an additional entry into ATL with separate parking, check-in kiosks, security checkpoints, baggage claim area, and U.S. customs. Note: you need not have an international flight to go through the international terminal and security lines are often a lot shorter.

International carriers Air Canada, Air France, British Airways, KLM Royal Dutch Airlines, Korean Air, Lufthansa, Qatar, Turkish, and Virgin Atlantic along with Delta have check-in counters at the international terminal.

Delta recently started offering a new biometric option to international passengers flying nonstop from Atlanta on Delta and its partner airlines Aeromexico, Air France-KLM, and Virgin Atlantic. This means facial scanning machines will replace the need to show your passport at self-service kiosks, baggage counters, TSA checkpoints, and boarding gates.

Okay.. So latest Q post is congratulating anon on finding connection. The date of the post? 12/17 which is mentioned in 365 pic related. DIG ANONS. Will continue myself on decode but my keyboard is messed up and on screen keyboard takes forever to type stuff.