Britain fitted the first-ever battery-operated heart in the first operation of its kind.
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Leonardo DiCaprio's environmental fund donated $5 million in the battle against Amazon rainforest fires that were devastating the area.
The Beatles released one of their all-time hits, Hey Jude, in the US.
The first electric power was generated at Niagara Falls.
Hundreds of thousands of people marched peacefully through the streets of Barcelona due to a terrorist attack.
Video gamer David Katz shot two people dead, injured nine then committed suicide at an NFL 19 tournament in Jacksonville, Florida.
