President Truman announced to the people of America that they successfully developed a hydrogen bomb.
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Galileo discovered the first three satellites of Jupiter.
Beyoncé and Jay-Z welcomed their daughter, Blue Ivy Carter, into the world.
Italy used its current tri-colored flag for the first time.
The first telephone call was made across the Atlantic – from London to New York.
Akihito succeeded his father to become the 125th Emperor of Japan.
