July 21st

STS-135 lands. This space shuttle was the 135th and the last space shuttle flight of American Space Shuttle program.
President Barack Obama signed into law the most sweeping overhaul of U.S. lending and high finance rules since the 1930s.
Dodd–Frank Wall Street Reform and Consumer Protection Act ...
Former Bosnian Serb leader Radovan Karadzic, one of the world's top war crimes fugitives, was arrested in a Belgrade suburb by Serbian security forces.
Radovan Karadžić
'Harry Potter and the Deathly Hallows', the final volume in the book series by J.K. Rowling, went on sale.
Harry Potter and the Deathly Hallows
Telecommunications giant WorldCom Inc. filed for bankruptcy protection after disclosing it had inflated profits by nearly $4 billion through deceptive accounting.
MCI Inc.
Astronaut Alan Shepard died at age 74.
Alan Shepard
Massachusetts Gov. Michael Dukakis accepted the Democratic presidential nomination at the party's convention in Atlanta.
Michael Dukakis
Lowest temperature ever measured on Earth. Vostok Station, a Russian station on Antarctica experienced the lowest temperatures ever measured in recorded human history. The temperatures fell to −128.6 °F (−89.2 °C)
Lowest temperature recorded on Earth
Mary Eugenia Charles is elected as PM of Dominica. Her election to office made her the first female and the longest PM of the Commonwealth of Dominica. She is also the first elected female head of state in the Americas.
Eugenia Charles
Libyan–Egyptian War begins. This short war between Libya and Egypt started with Libya striking Egyptian cities. The war lasted for 2 days with a ceasefire on July 24.
Libyan–Egyptian War
Aswan Dam opens in Egypt, enables human control of the flooding of the Nile.
First person walks on the Moon. Neil Armstrong became the first person to walk on the Moon. He stepped on the Moon's surface almost 7 hours after Apollo 11, the space craft that carried them, landed on the Sea of Traquility on the Moon. After stepping on the Moon, Armstrong uttered his famous words, "one small step for [a] man, one giant leap for mankind."
Apollo 11
Capt. Virgil "Gus" Grissom became the second American to rocket into a sub-orbital pattern around the Earth, flying on the Liberty Bell 7.
Mercury-Redstone 4
France surrendered North Vietnam to the Communists.
Battle of Dien Bien Phu
The U.S. Senate ratified the North Atlantic Treaty.
North Atlantic Treaty
The Democratic National Convention in Chicago nominated Sen. Harry S. Truman to be vice president.
1944 Democratic National Convention
In the 'Monkey Trial,' John T. Scopes was found guilty of violating Tennessee state law by teaching evolution.
Scopes Trial
After 13 years, the 4,607-mile Trans-Siberian railway is completed.
Author Ernest Hemingway was born in Oak Park, Ill.
Ernest Hemingway
The first train robbery west of the Mississippi was pulled off by Jesse James and his gang.
James–Younger Gang
The first Battle of Bull Run was fought at Manassas, Va., during the Civil War, resulting in a Confederate victory.
First Battle of Bull Run
Belgium became independent as Leopold I was proclaimed King of the Belgians.
Belgian Revolution
Crete Earthquake followed by tsunami around the Eastern Mediterranean allegedly destroys Alexandria.
365 Crete earthquake