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John Glenn - Wikipedia
John Glenn - Simple English Wikipedia, the free encyclopedia
John Glenn, the 1st American to orbit Earth, dies at age 95
John Glenn: 1st American to Orbit Earth, Oldest Man in Space
John H. Glenn - NASA
John Glenn - Career, Quotes & Life - Biography
60 Years Ago: John Glenn, the First American to Orbit the Earth ... - NASA
Biography of John H. Glenn - NASA
John Glenn - New World Encyclopedia
John Glenn | SpaceNext50 | Encyclopedia Britannica
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