UNITED STATES: HUMAN GEOGRAPHY

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Across
  1. 1. Hub of the American rail network on Lake Michigan (7)
  2. 3. America's largest corporation trading as Asda in the UK (7)
  3. 4. Dam on the Colorado completed in the 1930s (6)
  4. 5. Largest city of the USA (3,4)
  5. 7. Capital of the USA (10,1,1)
  6. 9. Financial centre of New York City (4,6)
  7. 10. New York street with a concentration of theatres (8)
  8. 11. Computer company founded by Bill Gates (9)
  9. 12. City devastated by earthquake in 1906 (3,9)
  10. 14. Pennsylvania steel city (10)
  11. 16. District of Los Angeles associated with movie stars (9)
  12. 18. Biggest oil company in the USA which also trades under the Esso brand name (5)
  13. 19. Worldwide restaurant franchise which began in California in 1937 (9)
  14. 21. Main city and port in Massuchusetts site of a 'tea party' in 1773 (6)
  15. 23. Largest state of the USA (6)
Down
  1. 1. Destination state in the 1849 'Gold Rush' (10)
  2. 2. Location of Disneyland (7)
  3. 4. 50th state of the USA and location of Pearl Harbour (6)
  4. 6. Car giant with HQ in Detroit (7,6)
  5. 8. The 'City of Angels' and largest on the Pacific coast (3,7)
  6. 13. City in Texas where NASA's Mission Control is found (7)
  7. 15. Large state on the Mexico border (5)
  8. 17. City known as 'Motown' because of its importance as a car munufacturing centre (7)
  9. 20. City in Nevada with a concentration of casinos (3,5)
  10. 21. Aircraft manufacturer based in Seattle (6)
  11. 22. Texan city linked with oil and long-running soap (6)
  12. 24. Computer manufacturer and one of the top 20 US companies (5)