'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