Monday, September 9, 1686

Elizabeth II (pictured) became the longest-reigning monarch of the United Kingdom, surpassing Queen Victoria.

A natural-gas pipeline in San Bruno, California, exploded and "shot a fireball more than 1,000 feet (300 m) in the air", killing eight people.

Two al-Qaeda attackers assassinated Ahmad Shah Massoud, a pivotal Afghan resistance leader, two days before the September 11 attacks in the United States.

The first banknotes of the Portrait Series of the Singapore dollar were introduced by the Board of Commissioners of Currency.

Imagine, the second solo album by John Lennon (pictured), was released.

Allegheny Airlines Flight 853 collided in mid-air with a Piper PA-28 Cherokee flown by a student pilot near Fairland, Indiana, killing all 83 occupants of and destroying both aircraft.

French president Charles de Gaulle delivered his "speech to the German youth" to 20,000 people in the courtyard of Ludwigsburg Palace (pictured).

U.S. president Dwight D. Eisenhower signed the Civil Rights Act of 1957, the first civil rights bill since Reconstruction.

A magnitude-6.7 earthquake struck near Chlef, killing over 1,200 people and forcing the Algerian government to implement comprehensive reforms in building codes.

World War II: About 3,000 Polish Army troops began a nearly month-long defence of the Hel Peninsula during the German invasion of Poland.

At the Lick Observatory in California, Edward Emerson Barnard discovered Amalthea (pictured), a moon of Jupiter and the last natural satellite to be discovered by visual observation.

At the Lick Observatory in California, Edward Emerson Barnard discovered Amalthea, a moon of Jupiter and the last natural satellite to be discovered by visual observation.