July 20th

Aurora shooting. A gunman, James Holmes, opened fire in a movie theater during the premier of the Dark Night Rises in Aurora, Colorado, killing 12 people and injuring 58 others.
2012 Aurora shooting
The Senate Judiciary Committee voted almost totally along party lines, 13-6, to approve Elena Kagan to be the Supreme Court's fourth female justice.
Sonia Sotomayor
After 38 years at the bottom of the Atlantic, astronaut Gus Grissom's Liberty Bell 7 Mercury capsule was recovered.
Mercury-Redstone 4
White House deputy counsel Vince Foster was found shot to death in a park near Washington, D.C., in an apparent suicide.
Vince Foster
A federal appeals court set aside Oliver North's Iran-Contra convictions.
Iran–Contra affair
Treasure hunters found the Spanish galleon Nuestra Senora de Atocha, which sank off the coast of Key West, Fla., in 1622 during a hurricane. The ship contained over $400 million in coins and silver ingots.
Mel Fisher
A flash flood hit Johnstown, Pa., killing 80 people and causing $350 million in damage.
Portal:Pittsburgh/On this day
Viking I lands on Mars. Part of the Viking program, Viking I became the first American spacecraft to succesfully land on MArs and to complete its mission.
Viking 1
Turkish invasion of Cyprus. Also known as Cyprus Peace Operation or Operation Attila, the invasion was a response to a coup in Cyprus.
Turkish invasion of Cyprus
Football War ends. A ceasefire came into effect between Honduras and El Salvador after the two countries fought a brief war over immigration El Salvador to Honduras. The hostilities occurred during North American trials of the FIFA World Cup.
Football War
Sirima Bandaranaike of Sri Lanka (then Ceylon) became the world's first woman prime minister.
Sirimavo Bandaranaike
Armistice for Indo-China signed, Vietnam separates into North & South.
Geneva Conference (1954)
King Abdullah I of Jordan was assassinated.
Abdullah I of Jordan
Adolf Hitler was only slightly wounded when a bomb planted by would-be assassins exploded at the German leader's Rastenburg headquarters.
20 July plot
Congresswoman Alice Mary Robertson becomes the first woman to preside over the US House of Representatives.
Alice Mary Robertson
The World War I draft lottery began.
Conscription in the United States
Fugitive Sioux Indian leader Sitting Bull surrendered to federal troops.
Portal:United States/Anniversaries/July/July 20
British Columbia joined the confederation as a Canadian province.
History of British Columbia
The Congress of the Confederate States began holding sessions in Richmond, Va.
Congress of the Confederate States
Colombia declared independence from Spain.
Colombian Declaration of Independence