American astronaut John Glenn dies at 95

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"Zero G (gravity) and I feel fine" - John Glenn's memorable words during his historic orbit of the Earth in 1962. He made quite an impression on Clayton Anderson, a former astronaut who spent five months aboard the international space station in 2007. He explains the legacy: (Photo: John Glenn with the crew of the Space Shuttle Discovery, 1998) (Credit: Tony Ranze/AFP/Getty Images)