Palestinian American journalist Shireen Abu Akleh was killed while reporting on an Israeli raid in the West Bank city of Jenin.

Gordon Brown stepped down as prime minister of the United Kingdom, ending 13 years of Labour Party rule. [Test your knowledge of British culture and politics.]

IBM’s chess-playing computer Deep Blue defeated Garry Kasparov in the last game of a six-game match to claim a 3.5–2.5 victory (it won two games and had three draws). It was the first time a current world champion had lost a chess match to a computer under tournament conditions. [Sort fact from fiction in our quiz about chess.]

Bob Marley died of cancer at age 36. His distillation of early ska, rock steady, and reggae musical forms blossomed in the 1970s into an electrifying rock-influenced hybrid that made him an international superstar. [Watch: How Bob Marley mainstreamed reggae.]

During World War II, U.S. troops invaded Attu, one of the Aleutian Islands captured by the Japanese in 1942. [How much do you know about World War II?]

Richard Feynman, a theoretical physicist who remade quantum electrodynamics and won a Nobel Prize in 1965, was born in New York City. [Sort fact from fiction in our physics quiz.]

Glacier National Park was established in the Rocky Mountain wilderness of northwestern Montana. [Take our quiz about national parks and landmarks.]

Railroad workers for the Pullman Palace Car Company went on strike. Their work stoppage, which severely disrupted rail traffic in the American Midwest, continued for several months until the federal government intervened, issuing an injunction and deploying troops to break the strike. [Watch: How the Pullman strike inspired the creation of Labor Day.]

Irving Berlin, who played a leading role in the evolution of the popular song from the early ragtime and jazz eras through the golden age of musicals, was born in Russia. [Test your knowledge of composers.]

Jazz cornetist King Oliver was born in Abend, Louisiana. [Take our quiz about musicians.]

U.S. President James K. Polk asked Congress to declare war on Mexico. [How much do you know about military history?]

Conjoined twins Chang and Eng, who gained worldwide fame in the 19th century, were born in Meklong, Siam (what is today Thailand).

Constantine I dedicated Byzantium—known today as Istanbul—as the new capital of the Eastern Roman Empire. [Test what you know about Roman and Byzantine emperors.]