America’s second president John Adams was inaugurated in Philadelphia, Pennsylvania.
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A nuclear disaster occurred at Three Mile Island in Pennsylvania, US.
Abraham Lincoln was elected the 16th president of the United States of America.
The United States Marine Corps was founded when two battalions of Continental Marines came together in Philadelphia, Pennsylvania.
George H. W. Bush declared himself President of the United States of America.
The Women's College of Pennsylvania, US opened – making it the 2nd female medical school in America.
