Here’s a look back at what happened in the Chicago area on April 21, according to the Tribune’s archives.
Is an important event missing from this date? Email us.
Weather records (from the National Weather Service, Chicago)
- High temperature: 88 degrees (1985)
- Low temperature: 27 degrees (1986)
- Precipitation: 1.08 inches (1973)
- Snowfall: 0.6 inches (1903)
1855: One person was killed and 60 more were arrested during the Lager Beer Riot, which protested a 600 percent increase in tavern license fees and Sunday closings. It was considered Chicago’s first civil disturbance.

1955: Conjoined 8-month-old twin girls, Deborah Marie and Christine Mary Andrews, were separated during an almost five-hour surgery performed by Mercy Hospital neurosurgeon Harold Voris.
It’s considered the first successful separation of twins who were joined at the head.

1967: At least 10 tornadoes touched down in northern Illinois. The most severe of them hit Belvidere, Oak Lawn and Lake Zurich. It was the worst such storm in the area’s history: Fifty-eight people were killed, including many children, and more than 1,000 were injured.
A front-page story in the Chicago Tribune the next day captured the anguish of most Chicagoans: “O, God, why did this happen.”

1986: Geraldo hosted “The Mystery of Al Capone’s Vaults” deep inside the former Lexington Hotel in Chicago.
Spoiler alert: There weren’t any jewels, money or cars inside — just a few old bottles and a sign. The real riches of the legendary boss of Chicago’s organized crime syndicate were more than 2,000 miles west in northern California, quietly occupying the homes of his four granddaughters — Veronica, Diane, Barbara and Theresa.

1996: The Chicago Bulls (72-10) extended their NBA single-season record for victories — 72 — while closing out the regular season with an impressive 33-8 record on the road, second-best in league history, behind the 1971-72 Los Angeles Lakers. (The Golden State Warriors finished 73-9 during the 2015-2016 season.)
The Bulls won their fourth NBA championship in six years on June 16, 1996, beating the Seattle SuperSonics 87-75.

2015: In a unanimous verdict, a three-judge panel in Denpasar District Court convicted Heather Mack and boyfriend Tommy Schaefer in the slaying of Sheila von Wiese-Mack.
Mack was sentenced to 10 years in prison for killing her mother, while Schaefer, who admitted fatally beating von Wiese-Mack but claimed self defense, received an 18-year prison term.
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