You're looking at an insane photo of South Korean soldiers in a building at the Joint Security Area of the Demilitarized Zone. When they open the door to the North, they hold hands to make sure they don't get pulled through, as seen in this screenshot from National Geographic's Inside North Korea documentary.
A link to this image is currently going crazy on Reddit.
It appears in our slideshow on the DMZ. For more, check out:
The Border Area Between North And South Korea May Be The Tensest Place On Earth >
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