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.
An earthquake with a moment magnitude of 8.2 and a maximum Mercalli intensity of IX (Violent) occurred in the New Guinea Trench, which generated a tsunami that killed 108 people.
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.
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.