Video 5 Secret Military Bases Hidden Underground

5 secret military bases hidden buried deep underground and spotted in satellite images and Google Earth...
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Dark5 presents 5 new underground military bases being built and in operation right now... including the mysterious Changgun-dae Mountain tunnels in one of the most dangerous countries in the world, China's "Underground Great Wall of China" network thousands of miles long, Russia's top secret closed city and the mystery base hiding under nearby Mount Yamantau, the strange unidentified Site911 bunker being constructed at an undisclosed location in Israel, and a classified project of bizarre tunnels being built right under the United States of America.