Real life heroes

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Across
  1. 3. Developer of the first successful polio vaccine
  2. 9. Civil rights activist known for refusing to give up her bus seat
  3. 11. Founder of modern nursing
  4. 12. Known for her humanitarian work in India
  5. 13. Pioneer in radioactivity research, first woman to win Nobel Prize
  6. 16. Women's rights activist who fought for women's suffrage
Down
  1. 1. German industrialist who saved over a thousand Jews during the Holocaust
  2. 2. Civil rights leader who had a dream(Acronyms)
  3. 4. Scientist who developed germ theory of disease
  4. 5. Key figure in the Underground Railroad
  5. 6. Anti-apartheid activist and former president of South Africa
  6. 7. Inventor and electrical engineer known for his work on alternating current
  7. 8. Leader of Indian independence movement
  8. 10. First man to walk on the moon
  9. 14. Physicist known for theory of relativity
  10. 15. CEO of SpaceX and Tesla, leading innovator in space and electric car industries