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  1. Spilling Water From A Tennessee Dam
  2. First Atom Bomb Test Site
  3. World War II poster of tanks rolling into battle and a locomotive in motion
  4. A Filthy Young Coal Miner After A Long Day Of Work In The Mines Of West Virginia
  5. Vintage Civil War poster of the Battle of Missionary Ridge
  6. Michelle Obama (1964- )
  7. Helen Wills Moody returning a high one during her match
  8. Thomas Edison, US inventor
  9. The Nine Year Siege of Troy
  10. Asian man wearing samurai armor
  11. Homeric cosmogony
  12. Concrete Blocks At Jewish Holocaust Memorial; Berlin, Germany
  13. A Civil War Era Regiment Of Colored Troops
  14. Plan Of the Campaign In New York And New Jersey, 1776
  15. Rough Riders Returning From Spanish-American War
  16. A Royal Air Force Hawker Typhoon Mk IB At Tangmere During World War II
  17. Earl Blaik was football coach at the United States Military Academy from 1941 to 1958
  18. Elvis Presley training with a bazooka while on maneuvers in Germany
  19. Columbus, Map, 15th Century
  20. Vice President Joseph Biden
  21. Revolutionary War Painting Showing The Surrender Of British General John Burgoyne
  22. Telephone switchboard operator, 1914
  23. Busy Train Station In Michigan
  24. Hubert Julian was the only licensed Black aviator in America
  25. Manuscript Of Fifteenth Amendment To The Constitution
  26. Grand Central Station In Manhattan
  27. Barack Obama (1961- )
  28. Willard Hotel, Washington, D.C
  29. Angela Davis (1944- )
  30. Title - Death Of Lincoln. Medium - Engraving Date- 1875
  31. Stock Exchange Image Magazine Page
  32. Construction Of The Library Of Congress Photos May 4, 1892
  33. The Acropolis, Athens, Greece, Europe
  34. Distillation, 16th century woodcut
  35. Anti Child Labor Poster, 1913
  36. Booker T. Washington (1856-1915)
  37. The Wonderful Story of Britain: The Boston Tea-Party
  38. The Battle Of Britain
  39. Legend of Archimedes and the lever
  40. Stonehenge at sunset
  41. Title Page From The Luther Bible, C.1530
  42. Panning for gold
  43. People Playing Lawn Tennis
  44. Rosalind Franklin, British chemist
  45. Luna Park, Pittsburgh, Pa
  46. Civil War, Atlanta, c1863
  47. Vintage World War I poster of Uncle Sam with a horse
  48. Charles (John Huffam) Dickens (1812-70), English author (B