622 - Prophet Muhammad completes his hijra from Mecca to Medina.
1780 - Benedict Arnold flees to the British Army lines when the arrest of British Major John Andre exposes Arnold's plot to surrender West Point.
1789 - The United States Congress passes the Judiciary Act which creates the office of the United States Attorney General and the federal judiciary system, and orders the composition of the Supreme Court of the United States.
1869 - "Black Friday": Gold prices plummet after Ulysses S. Grant orders the Treasury to sell large quantities of gold after Jay Gould and James Fisk plot t control the market.
1890 - The Church of Jesus Christ of Latter-day Saints officially renounces polygamy.
1906 - U.S. President Theodore Roosevelt proclaims Devils Tower in Wyoming as the nation's first National Monument.
1914 - World War I: The Siege of Przemysl (present day Poland) begins.
1946 - Clark Gifford and George Elsey, military advisors to U.S. President Harry S. Truman, present him with a top-secret report on the Soviet Union that first recommends the containment policy.
1957 - President Dwight D. Eisenhower sends the 101st Airborne Division troops to Little Rock, Arkansas, to enforce desegregation.
1960 - USS Enterprise (CVN - 65), the world's first nuclear-powered aircraft carrier, is launched.
1962 - United States court of appeals orders the University of Mississippi to admit James Meredith.
2005 - Hurricane Rita makes landfall in the United States, devastating Beaumont, Texas and portions of southwestern Louisiana.
2009 - The G20 summit begins in Pittsburgh with 30 global leaders in attendance. It marks the first use of LRAD in U.S. history.