The first newspaper from a vending machine was bought in Columbia, Pennsylvania.
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Donald Trump survived an assassination attempt during a campaign rally in Butler, Pennsylvania.
The Women's College of Pennsylvania, US opened – making it the 2nd female medical school in America.
The first-ever classified ad was published in The Times, London, UK.
The Marianna Coal Mine in Pennsylvania exploded and killed 154 men.
The Huffington Post was launched, founded by Arianna Huffington, Andrew Breitbart, Kenneth Lerer, and Jonah Peretti.
