1844: Mormon leader Joseph Smith and his brother, Hyrum, were killed by a mob in Carthage, Ill.
1971: The Fillmore East rock concert hall in New York closed after more than three years in business.
1976: Mansfield, S.D., was adopted by Mansfield, Mass., as a sister city as part of their bicentennial activities.
1981: Gas prices in Aberdeen were $1.32 for self-service regular and $1.53 for full-service unleaded premium.
1991: Supreme Court Justice Thurgood Marshall, the first black to sit on the nation's highest court, announced his retirement. (His departure led to the contentious nomination of Clarence Thomas to succeed him.)
Source: Dacotah Prairie Museum and The Associated Press