Milton S. Hershey founded Hershey’s Chocolate Company in Lancaster, Pennsylvania, US.
Source
The famous Liberty Bell arrived in Philadelphia, US.
Polio vaccines were given to the first group of children in the US at Arsenal Elementary School in Pittsburgh, Pennsylvania.
The American Declaration of Independence was publicly released in the Pennsylvania Evening Post.
The Marianna Coal Mine in Pennsylvania exploded and killed 154 men.
Donald Trump survived an assassination attempt during a campaign rally in Butler, Pennsylvania.
