What on Earth?

Military Mysteries (2x9)

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In 1988 satellites spot what appears to be a downed aviator signal in Laos 15 years after the war in Vietnam ended; spy imagery appears to show an American F-117 stealth fighter in an industrial complex in China; in 2004 a mapping satellite takes a picture of a lake in eastern Bagdad that is blood red is it evidence of crimes against humanity or something less sinister; images seem to show a big steel door on an entrance to a cave or underground base in Antarctica, could this be the remains of a Nazi base; a huge blanket of smoke covers southeastern North Korea and the time of year makes it unlikely to be normal wildfires; a large complex is discovered in the Ural Mountains of Russia causing concern in the US