A 6.9 earthquake in Spitak, Armenia, killed 25,000-50,000 people and left up to 500,000 homeless.
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Pearl Harbor was attacked.
Inventor Leo Baekeland patented the first thermosetting plastic, Bakelite, which sparked the birth of the plastics industry.
Delaware became the first state to ratify the US constitution.
An assassination attempt was made on the First Lady of the Philippines.
Thomas Edison demonstrated his phonograph to the editors of ''Scientific American.”