Franklin D. Roosevelt signed the Social Security Act, creating a government pension system for the retired.
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SpaceX successfully launched a Dragon spacecraft carrying the first supercomputer to space.
After being in construction for 632 years, the Cologne Cathedral was completed.
Pakistan gained independence from the British Empire – a day before India's independence.
A major blackout occurred in the Northeastern and Midwestern US along with Ontario, Canada.
The first-ever Japanese patent was issued.
