The United States in World War II 795
ATOM BOMBS TO BRAIN SCANS
Faced with alarming rumors of work on a German atomic bomb, America
mobilized some of the finest scientific minds in the world to create its own
atomic bomb. The energy released by its nuclear reaction was enough to
kill hundreds of thousands of people, as evidenced by the destruction of
Hiroshima and Nagasaki. But the resulting ability to harness the atom’s
energy also led to new technologies for diagnosing and treating human
diseases. Techniques such as positron emission tomography (PET) now
reveal the inner workings of the human brain itself.
1939–1945 WORLD WAR II
1945–1991 THE COLD WAR
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THINKING CRITICALLY
THINKING CRITICALLY
CONNECT TO HISTORY
1. Hypothesizing
Do you think that peacetime technolo-
gies would have been developed without the stimulus
provided by war? Support your answer.
SEE SKILLBUILDER HANDBOOK, PAGE R13.
CONNECT TO TODAY
2. Evaluating Technological Impact
What invention
or technological breakthrough do you think has had
the greatest impact on American society? Write a
paragraph to explain your answer. Stage a debate
with your classmates in which you defend your choice.
IRESEARCH LINKS
CLASSZONE.COM
TECHNOLOGY
Semiconductors
Computers
Freeze-dried food
Synthetic materials
Radar
MILITARY USE
Navigation
Code breaking
Soldiers’ rations
Parachutes, weapons
parts, tires
Tracking and surveillance
PEACETIME USE
Transistors, radios, electronics
Software programs, video games
TV dinners, space-shuttle rations
Telephones, automobile fenders,
pacemakers
Weather tracking, air traffic
control, archaeological digs
Applications of World War II Technology
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