Born 1821: Linus Yale (inventor)
1841: John Tyler first US vice president to take over after a president died
Died 1841: Ninth U.S. President William Henry Harrison died of pneumonia a month after inauguration
1887: Susanna Medora Salter became the first woman to be elected mayor of an American community (Argonia, Kansas)
Born 1913: Jules Léger (Canadian statesman)
Born 1915: Muddy Waters (musician)
Born 1944: Craig T. Nelson (actor)
1960: Ben Hur won 11 Academy Awards
1964: The Beatles occupied all the top 5 positions on the Billboard singles chart in the U.S.
Died 1968: U.S. civil rights leader Martin Luther King Jr. was shot and killed in Memphis, Tennessee
1969: The world's first totally artifical heart was implanted in a human by US surgeon Dr. Denton A. Cooley. The patient, Haskell Karp, lived only a few days, dying of pneumonia and kidney failure.
Born 1976: James Roday (actor)
Born 1979: Heath Ledger (actor)
2005: Army Sgt. 1st Class Paul Ray Smith's son accepted the nation's highest award for valor for his late father, who exposed himself to enemy fire in Iraq and saved at least 100 of his fellow U.S. soldiers. It was the first medal of honor awarded in the Iraq War
2010: A 7.2-magnitude earthquake struck just south of the U.S. border near Mexicali
Died 2013: Roger Ebert (film critic)
2015: Total Eclipse of the Moon.