1752 - The Liberty Bell arrives in Philadelphia.
1804 - Juno, one of the largest main belt asteroids, was discovered by German astronomer Karl Ludwig Harding.
1897 - The Boston subway opens, becoming the first underground metro in North America.
1804 - Juno, one of the largest main belt asteroids, was discovered by German astronomer Karl Ludwig Harding.
1897 - The Boston subway opens, becoming the first underground metro in North America.

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