Cleaning the river in pyongyang north korea

We saw thousands of people in the estuaries of the Taedong river cleaning the river. This is done periodically as silt accumulates. Many had hazmat clothing but some did not. Also see:

We saw thousands of people in the estuaries of the Taedong river cleaning the river. This is done periodically as silt accumulates. Many had hazmat clothing but some did not. Also see:
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