Georgia became the last of the Confederate States to be readmitted to the Union.
The Second Battle of the Marne began during World War I.
The world's tallest man (8 feet, 11.1 inches), Robert Wadlow, died.
John J. Pershing, whose leadership in World War I earned him the title General of the Armies of the United States, died in Washington, DC.
The Russian Soyuz and the U.S. Apollo launched. The Apollo-Soyuz mission was the first international manned spaceflight.
After 86 days of gushing oil into the Gulf of Mexico and several previous attempts to contain the flow, BP caps its leaking oil well.
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