King Carlos I of Portugal and his heir were assassinated in Lisbon.
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NBC-TV premiered ''Late Night with David Letterman."
Legendary rock singer Ozzy Osbourne announced his retirement from touring.
MP's in the UK voted in favor of triggering the European Union Bill (Article 50), which gave the government the power to prepare to leave the European Union.
The first volume of the Oxford English Dictionary was published.
Voice of America, the US' official external radio and television service, began broadcasting.
