Michael Moorer claimed the heavyweight boxing title after smashing Evander Holyfield in Paradise, Nevada, US.
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The Paris Agreement was opened for signatures.
The final gasps of the Crab Head nebula were observed as it went supernova.
Spain and Portugal signed the Treaty of Saragossa.
A controversial bill to send asylum seekers to Rwanda was approved by the UK's parliament.
Thieves stole $3.3 million from the First National Bank of Arizona in Tucson.