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• Harry Truman becomes the first president to address the nation on TV from the White House
On this day in 1947, President Harry S. Truman delivered the first televised presidential address from the White House — to a limited audience. Television was still in its infancy: There were only about 44,000 TV sets in U.S. homes, concentrated in a few cities, compared with some 40 million radios. Though Truman pioneered the now-familiar ritual of a White House telecast to the nation, he was not the first president to appear on television. President Franklin D. Roosevelt broadcast on a compact -
Transistor is invented, spurring growth in computers and electronics.
In 1947, scientists at Bell Telephone Laboratories invented the first transistor, a tiny circuit device that amplifies, controls, and generates electrical signals. The transistor could do the work of a much larger vacuum tube, but took up less space and generated less heat. The transistor could be used in radios, computers, and other electronic devices, and greatly changed the electronics industry. Because of the transistor, giant machines that once filled whole rooms could now fit on a desk. -
• President Eisenhower and Congress add the words “Under God” to the Pledge of Allegiance.
The Pledge of Allegiance was written in August 1892 by the socialist minister Francis Bellamy (1855-1931). It was originally published in The Youth's Companion on September 8, 1892. Bellamy had hoped that the pledge would be used by citizens in any country. In its original form it read: "I pledge allegiance to my Flag and the Republic for which it stands, one nation, indivisible, with liberty and justice for all."
In 1923, the words, "the Flag of the United States of America" were added. At th -
Polio vaccine announced to the world by Dr. Jonas Salk and Dr. Thomas Francis.
Jonas Edward Salk (October 28, 1914 – June 23, 1995) was an American medical researcher and virologist, best known for his discovery and development of the first safe and effective polio vaccine. He was born in New York City to parents from Ashkenazi Jewish Russian immigrant families. Although they themselves did not have much formal education, they were determined to see their children succeed. -
• The first nuclear power plant in the U.S. goes online at Shippingport, Pa
In 1953, US President Dwight D. Eisenhower gave his Atoms for Peace speech to the United Nations. Commercial nuclear power generation was cornerstone of his plan. A proposal by Duquesne Light Company was accepted by Admiral Rickover and the plans for the Shippingport Atomic Power Station started. It's was located near the present-day Beaver Valley Nuclear Generating Station on the Ohio River in Beaver County, Pennsylvania, USA, about 25 miles from Pittsburgh. -
NASA is established.
It may well be argued that NASA has become the world's premier agent for exploration, carrying on in "the new ocean" of outer space a long tradition of expanding the physical and mental boundaries of humanity. Fifty years ago, however the agency that pushed the frontiers of aeronautics, took us to the moon, flew the space shuttle, built the International Space Station and revealed the secrets of the cosmos, was in its birth throes, and fundamental decisions were being made that profoundly shaped
