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Zach Testa's chapter 27 timeline
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Truman gives televised speech
President Harry S. Truman was the first United States president to give a televised address to the American people on Oct. 5, 1947. In his speech, he asked Americans to cut back on eating meat, poultry and eggs in an effort to help the people of Europe. -
"Under God" added to the pledge
Congress passed the necessary legislation and Eisenhower signed the bill into law on Flag Day, June 14, 1954. Eisenhower stated "In this way we are reaffirming the transcendence of religious faith in America's heritage and future; in this way we shall constantly strengthen those spiritual weapons which forever will be our country's most powerful resource, in peace or in war." -
Polio vaccine announced
By the late 1940s, researchers around the country were supported by the National Foundation, studying the virus and testing strategies that might lead to a safe and effective vaccine against polio. Among these researchers were Drs. John Enders, Frederick Robbins and Thomas Weller at Harvard University, who would share the Nobel Prize in Medicine for their work growing polio in culture. Also studying the virus were Dr. Albert Sabin at the University of Cincinnati and Dr. Jonas Salk at the Univers -
Transistor in invented
transistor is a semiconductor device used to amplify and switch electronic signals and power. It is composed of a semiconductor material with at least three terminals for connection to an external circuit. A voltage or current applied to one pair of the transistor's terminals changes the current flowing through another pair of terminals. Because the controlled (output) power can be much more than the controlling (input) power, a transistor can amplify a signal. Today, some transistors are packa -
First nuclear power plant
Shippingport was created and operated under the auspices of Admiral Hyman G. Rickover, whose authority included a substantial role within the U.S. Atomic Energy Commission (AEC). Its design team was headed by Alvin Radkowsky. The reactor was capable of an output of 60 MWe. The reactor was designed with two uses in mind: for powering aircraft carriers, and serving as a prototype for commercial electrical power generation.[3] In 1977, it was converted to a Pressurized Light-Water Breeder Reactor -
NASA is established
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 all that was to come. NASA's top management from 1958-1960 was T. Keith Glennan, Administrator (center), Hugh L. Dryden, Deputy Administrator (left), and Richard E. Horner, Associate Administrator (right). Th
