When German aerospace engineer Wernher von Braun joined the U.S. military and space programs after World War II, he quickly became one of the foremost scientists credited with developing the ballistic missile, the first American satellite and the enormous Saturn V rocket that enabled man to reach the moon. See more in Season 10, Episode 2, "NASA's Secret Agenda."

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"Ancient Aliens" explores the controversial theory that extraterrestrials have visited Earth for millions of years.

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