1795 – US and Great Britain sign Jay Treaty, 1st US extradition treaty.
1853 – US President Franklin Pierce signs the Gadsden Purchase, buying 29,670 square-miles (76,800 square km) from Mexico for $10 million (now southern Arizona and New Mexico)
1897 – Hail injures 26 in Topeka, Kansas.
1930 – 1st radar detection of planes, Anacostia, Washington, D.C.
1938 – 500 ton meteorite lands near Pittsburgh, Pennsylvania.
1939 – PanAm’s 1st US to England flight.
1947 – Flying saucer sighted over Mount Rainier by pilot Ken Arnold.
1949 – Cargo airlines 1st licensed by US Civil Aeronautics Board.
1957 – The U.S. Supreme Court rules that obscenity is not protected by the First Amendment in Roth v. United States.
1964 – FTC rules health warnings must appear on all cigarette packages.
1966 – Period of relative peace following WW II exceeds that following WW I.
1968 – Deadline for redeeming silver certificate dollars for silver bullion.
1970 – US Senate votes overwhelmingly to repeal Gulf of Tonkin Resolution.
1975 – Eastern 727 crashes at JFK Airport NY, kills 113.
1977 – IRS reveals Jimmy Carter paid no taxes in 1976.
1982 – US Supreme Court rules president can’t be sued for actions in office.
1986 – US Senate approves “tax reform”
1993 – Yale computer science professor Dr. David Gelernter loses the sight in one eye, the hearing in one ear, and part of his right hand after receiving a mail bomb from the Unabomber.
2004 – Capital punishment is declared unconstitutional in New York.
2018 – Women drive for the first time in Saudi Arabia after a ban is lifted.