September 11: on this day in history

Historical events

1. 1609Explorer Henry Hudson reached Manhattan Island, now the heart of New York.
2. 1792The large blue diamond now known as the 'Hope Diamond' was stolen from the French royal treasury.
3. 1922The Treaty of Kars, concluded between the government of the Turkish Grand National Assembly and the Soviet republics of the South Caucasus, was ratified.
4. 1941Construction began on the giant Pentagon building that would house the US military headquarters.
5. 1997NASA's Mars Global Surveyor reached Mars and prepared to study the planet from orbit.

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