World News | Siobhán O'Grady, The Washington Posrt | Sunday September 9, 2018
From a distance, the mosaic-like screen of shifting colors almost appears to be electronic, lighting up a North Korean stadium like a huge TV. But on closer look, it's not a screen at all: It's thousands of people holding up colored placards, shifting them in synchrony to create the effect of a moving image.
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