It is a protest, against the South side of the peninsula. This was after North Korean defectors sent anti-Kim regime propaganda leaflets via balloons. If you remember, at around the same time, Kim Yo Jong, sister of Kim Jong Un ordered the blow up of the joint liaison office in Kaesong.
1. In the beginning God created the heavens and the earth. 2. And the earth was formless and void, and darkness was over the surface of the deep; and the Spirit of God was moving over the surface of the waters. 3. Then God said, "Let there be light"; and there was light. 4. And God saw that the light was good; and God separated the light from the darkness. Genesis 1 (one)