The nation's capital is founded, the world gets its first parking meter, Joltin' Joe sets an unbreakable record, and man heads to the moon, all on this day.
1945: The Atomic Age begins when the United States successfully detonates a plutonium-based test nuclear weapon at the Trinity site near Alamogordo, New Mexico, as part of the top-secret Manhattan Project.
Jim Rogash/Getty Images
Frederick M. Brown/Getty Images for MTV
Christopher Polk/Getty Images for MTV
Frazer Harrison/Getty Images
Library of Congress
Mario Tama/ Getty
National Archives and Records Administration
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