The Civil Marriage Act was introduced, making same-sex marriage legal in Canada.
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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.
Martin Luther King Jr. and 250 protestors were arrested.
Voice of America, the US' official external radio and television service, began broadcasting.
Myanmar's leader Aung San Suu Kyi was removed from power by a military coup d'état.
King Carlos I of Portugal and his heir were assassinated in Lisbon.
