Nobel Prize Awardees from America

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Across
  1. 5. shuttle diplomacy
  2. 6. famous president and nobel prize awardee
  3. 7. discovery of DNA
  4. 8. The times they are a changin'
Down
  1. 1. Not colour of skin, but content of charector
  2. 2. discovered the theory of relativity
  3. 3. CRISPR
  4. 4. peaceful president of America