In 1861, the Maryland House of Delegates voted 53-13 against seceding from the Union.
In 1945, during World War II, American soldiers liberated the Dachau concentration camp.
In 1946, 28 former Japanese officials went on trial in Tokyo as war criminals; seven ended up being sentenced to death.
In 1983, Harold Washington was sworn in as the first black mayor of Chicago.
In 1992, rioting resulting in 55 deaths erupted in Los Angeles after a jury in Simi Valley, Calif., acquitted four Los Angeles police officers of almost all state charges in the videotaped beating of Rodney King.
In 1993, Britain's Queen Elizabeth II announced that for the first time, Buckingham Palace would be opened to tourists to help raise money for repairs at fire-damaged Windsor Castle.
In 2011, Britain's Prince William and Kate Middleton were married in an opulent ceremony at London's Westminster Abbey.
Today's Birthdays: Poet Rod McKuen is 81. Actor Keith Baxter is 81. Bluesman Otis Rush is 79. Conductor Zubin Mehta is 78. Disgraced financier Bernard Madoff is 76. Country singer Duane Allen (The Oak Ridge Boys) is 71. Singer Tommy James is 67. Comedian Jerry Seinfeld is 60. Actress Kate Mulgrew is 59. Actor Daniel Day-Lewis is 57. Actress Michelle Pfeiffer is 56. Actress Eve Plumb is 56. Country singer Stephanie Bentley is 51. Singer Carnie Wilson (Wilson Phillips) is 46. Actress Uma Thurman is 44. Tennis player Andre Agassi is 44. Rapper Master P is 44. Actor Darby Stanchfield is 43. Country singer James Bonamy is 42. Gospel/rhythm-and-blues singer Erica Campbellis 42. Actor Tyler Labine is 36. Actress-model Taylor Cole is 30. Actor Zane Carney is 29. Pop singer Amy Heidemann (Karmin) is 28. Pop singer Foxes is 25.