17 February 1951

Arab Spring: Bahraini security forces killed four protesters in a pre-dawn raid at the Pearl Roundabout in Manama, while the "Day of Rage" took place in Libya with nationwide protests against Muammar Gaddafi's government.

The Troubles: The Provisional Irish Republican Army carried out a bombing of a restaurant near Belfast, Northern Ireland, killing twelve people and injuring thirty others.

A U.S. Army soldier stole a Bell UH-1 helicopter (pictured) and landed it on the South Lawn of the White House in Washington, D.C.

Gabonese military officers overthrew President Léon M'ba, but French forces, honouring a 1960 treaty, forcibly reinstated him two days later.

Vanguard 2 (model pictured), the first weather satellite, was launched to measure cloud cover distribution.

World War II: The U.S. Navy began Operation Hailstone, a massive naval air and surface attack against the Japanese naval and air base at Chuuk Lagoon in the Caroline Islands.

The Armory Show (commemorative button pictured), the first large modern-art exhibition in the United States, opened at the 69th Regiment Armory in New York City.

Italian composer Giacomo Puccini's Madama Butterfly premiered at La Scala in Milan to poor reviews, forcing him to revise the opera.

Rudolf Diesel's first working diesel engine ran for one minute.

Cochinchina campaign: French Navy forces captured the Citadel of Saigon, defended by 1,000 Vietnamese soldiers of the Nguyễn dynasty.

Great Trek: Zulu impis massacred about 532 Voortrekkers, Khoekhoe, and Basuto near present-day Weenen, South Africa.

The United States ratifies the Treaty of Ghent – signed in late 1814 – formally ending the War of 1812.

Myles Standish was elected the first commander of the militia of Plymouth Colony.

Military vehicles explode outside a Turkish Armed Forces barracks in Ankara, Turkey, killing at least 29 people and injuring 61 others.

Arab Spring: Libyan protests against Muammar Gaddafi's regime begin.

Arab Spring: In Bahrain, security forces launch a deadly pre-dawn raid on protesters in Pearl Roundabout in Manama; the day is locally known as Bloody Thursday.

Kosovo declares independence from Serbia.

A massive mudslide occurs in Southern Leyte, Philippines; the official death toll is set at 1,126.

In Philadelphia, world champion Garry Kasparov beats the Deep Blue supercomputer in a chess match.

NASA's Discovery Program begins as the NEAR Shoemaker spacecraft lifts off on the first mission ever to orbit and land on an asteroid, 433 Eros.

The Cenepa War between Peru and Ecuador ends on a ceasefire brokered by the UN.

First Nagorno-Karabakh War: Armenian troops massacre more than 20 Azerbaijani civilians during the Capture of Garadaghly.

Ryan International Airlines Flight 590 crashes during takeoff from Cleveland Hopkins International Airport, killing both pilots, the aircraft's only occupants.

First winter ascent of Mount Everest by Krzysztof Wielicki and Leszek Cichy.