In 1973, American National's Springfield Home Office Opened; What Else Was Happening?

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Across
  1. 2. First U.S. state to post distance in metric on signs
  2. 5. Japanese Artist and Peace Activist granted permanent residency in the United States
  3. 8. First American space station launched
  4. 9. This band had their first performance at the Popcorn Club
  5. 11. "The Young and the ___" first premiered.
  6. 12. ____ Rock appears on ABC-TV
  7. 14. This country gained its independence from Great Britain
  8. 15. This first phone call was made from New York
  9. 19. Trial begins for the burglars of this political scandal
  10. 20. Placed on an envelope and the cost is $0.08
  11. 21. Citizens of this country allowed to own gold
  12. 23. NBC western television series ends after 14 seasons
  13. 25. This famous Australian band formed
  14. 26. This billionaire enrolls at Harvard University
  15. 27. Famous tower opened in Chicago, IL
Down
  1. 1. United States President
  2. 3. "The Dark Side of the Moon" was released by _____ Floyd
  3. 4. Played in Springfield, MO for their Desperado Tour
  4. 6. First car company to introduce airbags to the public
  5. 7. Music star televised worldwide in Hawaii
  6. 8. Horse that won all races in the Triple Crown
  7. 10. Superbowl VII winners
  8. 13. First female pilot hired by a U.S. scheduled airline
  9. 16. Sydney ___ House opened
  10. 17. Academy Award winner for Best Picture
  11. 18. These Athletics win the World Series
  12. 22. Beat the LA Lakers in the NBA Finals
  13. 24. "The Say Hey Kid" retires