The US Postal Service was founded.
Benjamin Franklin was named the first Postmaster General.
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In one day, Facebook lost $120 billion in value on the stock market.
President Harry Truman signed the National Security Act.
Italian adventurer and author Giacomo Casanova was arrested in Venice for his offensive remarks on religion.
The opera 'Parsifal' by Richard Wagner premiered in Bayreuth, Germany.
Alice in Wonderland premiered in London.