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Battle of Midway ends: Admiral Chester Nimitz wins 1st World War II naval defeat of Japan.
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U.S. President Franklin Roosevelt, in an attempt to check inflation, freezes wages and prices, prohibits workers from changing jobs unless the war effort would be aided thereby, and bars rate increases to common carriers and public utilities.
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Roosevelt becomes 1st US President to visit a foreign country during wartime.
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The Manhattan Project's G-5 Group, headed by Physicist's Donald Kerst and Seth Neddermeyer, take their first betatron pictures of a nuclear implosion at the Los Alamos Laboratory.
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1st test detonation of an atomic bomb, Trinity Site, Alamogordo, New Mexico as part of the US Manhattan Project.
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US President Harry Truman establishes Atomic Energy Commission.
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John F. Kennedy (Democrat, Massachusetts) elected to US House of Representatives.
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Groundbreaking ceremony for the Hollywood sign in Hollywood, Los Angeles; old Hollywood land sign torn down, reconstruction of a replacement begins with just Hollywood.
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Albert Einstein warns against hydrogen bomb.
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North Korea and the United Nations sign armistice to stop fighting and divide Korea at the 38th parallel.