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On this day in history Harry Truman was the first president to deliver a story from the white house.
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This was the worlds first electronic power plant. It was able to create an output of 60 MWe.The plant cost an estimate of 75.5 million dollars.
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On this day in history scientists Jonas Salk, made a vaccine for polio that is now 90% effectible.
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In 1955, the U.S. changed the pledge of allegiance. They added new words, ''Under God''.
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A transistor is invented making the way computers and other electronics are used and communicate today
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NASA, the United States way of seeing the world. NASA was helped structure by one of its founding fathers ''Keith Glennan''.