Rwanda, Burundi, Jamaica, and Trinidad and Tebogo were admitted to the United Nations.
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The UN reported that one million plant and animal species were at risk of extinction.
Fifty countries signed the United Nations Charter in San Francisco.
Liechtenstein became the 160th member of the United Nations.
The longest ever United Nations climate talk ended.
Dwight D. Eisenhower gave his 'Atoms for Peace' speech at the United Nations in New York.
