This is the Pre-Security area of the Portland International Airport before where they check your bags for your flight.
<a href="//commons.wikimedia.org/w/index.php?title=User:NoNameHere&amp;action=edit&amp;redlink=1" class="new" title="User:NoNameHere (page does not exist)">NoNameHere</a>
CC BY-SA 4.0
<span class="int-own-work" lang="en">Own work</span>