1804 – The Lewis and Clark Expedition officially begins as the Corps of Discovery departs from St. Charles, Missouri.
1807 – A grand jury indicts former Vice President Aaron Burr on a charge of treason.
1826 – HMS Beagle departs on its first voyage.
1849 – Future President Abraham Lincoln is issued a patent for an invention to lift boats, making him the only U.S. President to ever hold a patent.
1856 – Congressman Preston Brooks of South Carolina severely beats Senator Charles Sumner of Massachusetts with a cane in the hall of the U.S. Senate for a speech Sumner had made regarding Southerners and slavery.
1872 – President Ulysses S. Grant signs the Amnesty Act into law, restoring full civil and political rights to all but about 500 Confederate sympathizers.
1900 – The Associated Press is formed in New York City as a non-profit news cooperative.
1906 – The Wright Brothers are granted U.S. patent number 821,393 for their “Flying-Machine.”
1972 – Richard Nixon became the first U.S. president to visit Moscow.
1992 – Johnny Carson ended his nearly 30-year career as the host of The Tonight Show.
2017 – A suicide bomber killed 22 people attending an Ariana Grande concert in Manchester, England.
