Nine thousand scientists from 43 nations signed a petition to ban nuclear testing.
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Walt Disney's Mickey Mouse comic strip was published for the first time.
The most destructive riot in Constantinople's history, the Nika Riots, began during a chariot race.
Serial killer Jeffrey Dahmer changed his plea from not guilty to guilty but insane.
Alfredo Ormando set himself on fire in St. Peter's Square, protesting against the Roman Catholic Church's teaching on homosexuality.
Center left-wing Independent Labour Party was formed in Britain with Keir Hardie as the leader.
