Today is Friday, April 4, the 94th day of 2014. There are 271 days left in the year.

Today's Highlight in History:

On April 4, 1968, civil rights leader Martin Luther King Jr., 39, was shot and killed while standing on a balcony of the Lorraine Motel in Memphis, Tenn. (James Earl Ray later pleaded guilty to assassinating King, then spent the rest of his life claiming he'd been the victim of a setup.)

On this date:

In 1818, Congress decided the flag of the United States would consist of 13 red and white stripes and 20 stars, with a new star to be added for every new state of the Union.

In 1841, President William Henry Harrison succumbed to pneumonia one month after his inaugural, becoming the first U.S. chief executive to die in office.

In 1850, the city of Los Angeles was incorporated.

In 1859, "Dixie" was performed publicly for the first time by Bryant's Minstrels at Mechanics' Hall in New York.

In 1864, in a letter to Kentucky newspaper editor Albert G. Hodges, President Abraham Lincoln wrote, "I claim not to have controlled events, but confess plainly that events have controlled me."

In 1912, China proclaimed a republic in Tibet, a move fiercely opposed by Tibetans.

In 1933, the Navy airship USS Akron crashed in severe weather off the New Jersey coast with the loss of 73 lives.

In 1949, 12 nations, including the United States, signed the North Atlantic Treaty in Washington, D.C.

In 1960, Elvis Presley recorded "Are You Lonesome Tonight?" in Nashville for RCA Victor.

In 1974, Hank Aaron of the Atlanta Braves tied Babe Ruth's home-run record by hitting his 714th round-tripper in Cincinnati.

In 1975, more than 130 people, most of them children, were killed when a U.S. Air Force transport plane evacuating Vietnamese orphans crash-landed shortly after takeoff from Saigon.

In 1983, the space shuttle Challenger roared into orbit on its maiden voyage. (It was destroyed in the disaster of Jan. 1986.)

Ten years ago: Supporters of Muqtada al-Sadr, an anti-American cleric, rioted in four Iraqi cities, killing dozens of Iraqis, eight U.S. troops and a Salvadoran soldier.

Five years ago: A gunman killed three Pittsburgh police officers responding to a domestic disturbance call; Richard Poplawski was later convicted of murder and sentenced to death. Police in Washington state found the body of James Harrison, who'd apparently shot to death five of his children, ages 7 to 16, at their mobile home in Graham. NATO leaders appointed Danish Prime Minister Anders Fogh Rasmussen the alliance's new secretary-general during a two-day, 60th-anniversary summit in Strasbourg, France.

One year ago: Connecticut Gov. Dannel P. Malloy signed into law sweeping new restrictions on weapons and large capacity ammunition magazines similar to the ones used by the young man who'd gunned down 20 children and six educators in the Sandy Hook Elementary School massacre. At least 72 people were killed in the collapse of an eight-story residential building being constructed illegally near Mumbai, India's financial capital. Pulitzer Prize-winning film reviewer Roger Ebert, 70, died in Chicago.

Today's Birthdays: Actress Elizabeth Wilson is 93. Author-poet Maya Angelou is 86. Former Sen. Richard Lugar, R-Ind., is 82. Recording executive Clive Davis is 82. Bandleader Hugh Masekela is 75. Author Kitty Kelley is 72. Actor Craig T. Nelson is 70. Actor Walter Charles is 69. Actress Christine Lahti is 64. Country singer Steve Gatlin (The Gatlin Brothers) is 63. Actress Mary-Margaret Humes is 60. Writer-producer David E. Kelley is 58. Actor Phil Morris is 55. Actress Lorraine Toussaint is 54. Actor Hugo Weaving is 54. Rock musician Craig Adams (The Cult) is 52. Talk show host/comic Graham Norton is 51. Actor David Cross is 50. Actor Robert Downey Jr. is 49. Actress Nancy McKeon is 48. Actor Barry Pepper is 44. Country singer Clay Davidson is 43. Rock singer Josh Todd (Buckcherry) is 43. Singer Jill Scott is 42. Rock musician Magnus Sveningsson (The Cardigans) is 42. Magician David Blaine is 41. Singer Kelly Price is 41. Rhythm-and-blues singer Andre Dalyrimple (Soul For Real) is 40. Actor James Roday is 38. Actress Natasha Lyonne is 35. Actor Eric Andre is 31. Actress Amanda Righetti is 31. Actress Jamie Lynn Spears is 23. Actress Daniela Bobadilla (TV: "Anger Management") is 21. Pop singer Austin Mahone is 18.

Thought for Today: "The only sure thing about luck is that it will change." -- Bret Harte, American author and journalist (1836-1902).

Copyright 2014, The Associated Press. All rights reserved.