Salem on History

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Geographical Location - Pennsylvania

51. The St. Lawrence Seaway Is Completed
52. The St. Lawrence Seaway Is Opened
53. Station KDKA Introduces Commercial Radio Broadcasting
54. Steel Workers Go on Strike to Demand Improved Working Conditions
55. Susquehannock
56. Szent-Györgyi Discovers Vitamin C
57. A Tank Collapse Releases Fuel into the Monongahela River
58. Terrorists Attack the Pentagon and World Trade Center
59. Three Mile Island Accident
60. The Three Mile Island Accident Prompts Nuclear Industry Reforms
61. The Three Mile Island Accident Prompts Reforms in Nuclear Power
62. U.S. Constitution Is Adopted
63. The United States Opens the First Commercial Nuclear Power Plant
64. A Vaccine Is Developed for German Measles
65. Volkswagen Opens the First Foreign-Owned U.S. Auto Plant
66. Walking Purchase
67. Washington’s Farewell Address
68. Whiskey Rebellion
69. XYZ Affair
70. Zworykin Develops an Early Type of Television

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