America’s Book of Secrets Season 3 Conspiracy Theories TV Tv Shows

America’s Book of Secrets S03E08 – Secret Underground

America’s Book of Secrets S03E08 Secret Underground

Americans may be aware of what’s above ground, but do they know what’s concealed beneath? And could subterranean facilities on U.S. soil house secrets so dangerous, our government would stop at nothing to keep them hidden? We examine the tunnels, cities, and fortresses covertly constructed beneath the feet of the American public.

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