On this day in History - September 14

1901 – U.S. president William McKinley dies after being mortally wounded on September 6 by anarchist Leon Czolgosz and is succeeded by Vice President Theodore Roosevelt.

1917 – The Russian Empire is formally replaced by the Russian Republic.

1954 – In a top secret nuclear test, a Soviet Tu-4 bomber drops a 40 kiloton atomic weapon just north of Totskoye village.

1960 – The Organization of Petroleum Exporting Countries (OPEC) is founded.

1975 – The first American saint, Elizabeth Ann Seton, is canonized by Pope Paul VI.

2003 – In a referendum, Estonia approves joining the European Union.