The first US commercial bank, The Bank of North America, opened in Philadelphia.
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Black men were chased away by gunmen after trying to rescue white survivors during a mine explosion.
Galileo discovered the first three satellites of Jupiter.
A 57-year-old man received the first transplanted heart from a genetically modified pig.
The distress signal 'CQD' was established.
Italy used its current tri-colored flag for the first time.
