August 21 in History

Significant events that happened on this day.

Today

Historical Events

2017

Millions of Americans experienced a total solar eclipse visible across the continental United States

The 'Great American Eclipse' was the first total solar eclipse visible coast-to-coast across the U.S. since 1918. The path of totality stretched from...

1995

A computer error caused a fighter jet to shoot itself down

During a test flight, an F-11 Tiger pilot fired a burst from his 20mm cannons, then accelerated and descended into his own gunfire. The rounds he fire...

1986

A toxic cloud of carbon dioxide erupted from Lake Nyos in Cameroon, killing 1,746 people

The limnic eruption released an estimated 100,000-300,000 tons of CO2 from the lake's depths. The heavier-than-air gas cloud descended into nearby vil...

1983

Philippine opposition leader Benigno Aquino Jr. was assassinated at Manila airport

Aquino was shot in the head moments after stepping off the plane from exile in the United States. The assassination, widely believed to be ordered by...

1972

John Lennon performed his last major concert at Madison Square Garden

The One to One benefit concert featured Lennon and Yoko Ono performing with Elephant's Memory to raise money for children with intellectual disabiliti...

1968

Soviet tanks rolled into Czechoslovakia to crush the Prague Spring reform movement

Major

The Warsaw Pact invasion involved 200,000 troops and 2,000 tanks entering Czechoslovakia to end Alexander Dubček's liberalization reforms. The invasio...

1959

Hawaii became the 50th state of the United States

Major

President Dwight D. Eisenhower signed the proclamation admitting Hawaii to the Union as the 50th state. Hawaii had been a U.S. territory since 1898, a...

1951

A woman in New York became the first person to survive jumping off the Brooklyn Bridge

The jumper survived the 135-foot fall into the East River and was rescued by the Coast Guard. She suffered only minor injuries, despite the fact that...

1945

The Manhattan Project officially ended after successfully developing the atomic bomb

Major

President Truman terminated the wartime research program just days after Japan's surrender. The project had employed over 130,000 people and cost near...

1930

Princess Margaret of the United Kingdom was born

The younger sister of Queen Elizabeth II was born at Glamis Castle in Scotland. Known for her rebellious nature and glamorous lifestyle, Margaret beca...

1911

The Mona Lisa was stolen from the Louvre in Paris

Major

Italian handyman Vincenzo Peruggia walked out of the Louvre with Leonardo da Vinci's masterpiece hidden under his coat. The painting wasn't recovered...

1888

The first successful adding machine in the United States received a patent

William Seward Burroughs received his patent for the calculating machine, which became the foundation of the Burroughs Corporation. His invention revo...

1560

The first documented water-skiing event took place in France

According to historical records, a Frenchman demonstrated skiing on water while being pulled by horses. This early form of water skiing was performed...

Fun Facts from August 21