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'Unsinkable' Titanic, largest man-made structure, sinks
Atomic bomb tested in New Mexico
Congress passes interstate highway bill
D-Day invasion marks the beginning of the end of World War II in Europe
Democrat Franklin D. Roosevelt beats incumbent President Herbert Hoover
Earthquake hits San Francisco: 'Paris of the West' burns
FDA approves birth control pill
First regular radio broadcasts begin in America
Jackie Robinson breaks baseball's color barrier
Manhattan Project begins secret work on atomic bomb: Fermi triggers first atomic chain reaction
Marconi transmits radio signal across the Atlantic
Pathfinder lands on Mars, sending back astonishing photos
Russian revolution ends: Communists take over
Soviets blockade West Berlin: Western allies respond with massive airlift
Standard Oil loses Supreme Court antitrust suit: monopolies suffer blow
Structure of DNA discovered
Television debuts in America at New York World's Fair
The U.S. Surgeon General warns about smoking-related health hazards
U.S. Senate rejects Versailles Treaty: dooms League of Nations
United States enters World War I
United States sends troops to defend South Korea
Wilbur and Orville Wright fly the first powered airplane
World War I begins in Europe
World Wide Web revolutionizes the Internet
Yuri Gagarin becomes first man in space