Cities of the Underworld
Season 0 / Episode 9
San Francisco is one of the nation's largest military defense installations with a huge underground ammunition depot, a former nuclear arsenal and Civil War fortifications buried under Alcatraz; human trafficking tunnels in Chinatown.
Genre - Documentary/History/Science/World history
Running Time - 44min
Country - USA
Language - en
Original Air Date - Monday 12th January 2009
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