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  1. John Glenn - Wikipedia

  2. John Glenn - Simple English Wikipedia, the free encyclopedia

  3. John Glenn, the 1st American to orbit Earth, dies at age 95

  4. John Glenn: 1st American to Orbit Earth, Oldest Man in Space

  5. John H. Glenn - NASA

  6. John Glenn - Career, Quotes & Life - Biography

  7. 60 Years Ago: John Glenn, the First American to Orbit the Earth ... - NASA

  8. Biography of John H. Glenn - NASA

  9. John Glenn - New World Encyclopedia

  10. John Glenn | SpaceNext50 | Encyclopedia Britannica

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