◆ On this day

May 10

2 sourced moments from May 10 in history: The transcontinental railroad is completed at Promontory, Utah (1869); and Nelson Mandela is inaugurated as South Africa's first Black president (1994).

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2 things happened on May 10

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1994 Society & Economy · Politics & Law

Nelson Mandela is inaugurated as South Africa's first Black president

After 27 years in prison, Mandela took the oath at Pretoria's Union Buildings, closing the book on apartheid rule.

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1869 Technology · Transportation

The transcontinental railroad is completed at Promontory, Utah

A ceremonial golden spike joined two railroads at Promontory Summit, and a single telegraphed word — DONE — announced a coast-to-coast nation.

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