Happy greetings or goodbyes. Airports used to much more open, and as people tended to take pics on arrivals and departures there are lots of examples. Groups posed on the tarmac at airports, or people on the open-air stairs into airplanes are common. Its a pity this has changed as the wonderful backdrop of airport buildings, tarmac and planes, with its industrial look and travel romance is no longer seen.
This was one of the dirtiest slides I’ve ever had to deal with. Dust was stuck to the surface and couldn’t be wiped off. I managed to clean up most of it digitally. Then it needed lightening and selective color improvements.