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From Wikipedia's newest articles:

• ...that Academy Award winner Going My Way was filmed at St. Monica's (pictured), and the irascible old Irish priest character was based on its pastor?
• ...that Lionel Monckton, the most popular musical theatre composer of the Edwardian period, after dropping into obscurity by the end of the 20th century, recently has had two albums of his music released?
• ...that over 25% of Brazil's electricity is generated by a hydroelectric plant at Itaipu on the Paraná River?
• ...that state senator Larry George sued Senate President Peter Courtney in an attempt to prevent an experimental session of the Oregon Legislature?
• ...that a Muslim fundamentalist beheaded a statue of the Virgin Mary at St. Augustine's and carted a statue of Father Serra to a nearby mosque in October 2001?
• ...that Vasyl Krychevsky, a Ukrainian artist, designed the state emblem of the National Republic at the request of Mykhailo Hrushevskyi?
• ...that Sheenboro, Quebec, started as a trading post on the Ottawa River and has retained its character as a "Little Corner of Ireland"?
• ...that John Percy Farrar recommended George Mallory for inclusion on the 1921 British Reconnaissance Expedition to Mount Everest?
• ...that the Quarterly Journal of Microscopical Science, founded in 1853, was edited for 68 years by the Lankester family?
  

• Fernando Lugo (pictured) wins the presidential election in Paraguay, ending the Colorado Party's 61-year rule.
• In auto racing, Danica Patrick wins the Indy Japan 300, becoming the first female driver to win an IndyCar race.
• An airliner operated by Hewa Bora Airways crashes upon takeoff in Goma, Democratic Republic of the Congo, killing at least 44 people.
• An alliance led by Silvio Berlusconi of the People of Freedom party wins the general election in Italy.
• Trevor Immelman of South Africa wins the 2008 Masters Tournament at the Augusta National Golf Club.
• Jacques-Édouard Alexis is ousted as Prime Minister of Haiti following riots over the price of food.
• The Channel Island Sark abolishes the last remaining feudal system in Europe.

April 22: Earth Day.

• 1500 – Portuguese explorer Pedro Álvares Cabral (pictured) and his crew became the first Europeans to sight Brazil when they spotted Monte Pascoal.
• 1889 – Over 50,000 people rushed to claim a piece of the available two million acres (8,000 km²) in the Unassigned Lands, the present-day U.S. state of Oklahoma. Within hours, both Oklahoma City and Guthrie had established cities of around 10,000 people.
• 1915 – The Germans released chlorine gas as a chemical weapon in the Second Battle of Ypres, killing over 5,000 soldiers within ten minutes by asphyxiation in the first large-scale successful use of poison gas in World War I.
• 1930 – France, Italy, Japan, the United Kingdom, and the United States signed the London Naval Treaty, regulating submarine warfare and limiting military ship building.
• 1945 – About 600 prisoners of the Jasenovac concentration camp in the Independent State of Croatia revolted, but only 80 managed to escape while the other 520 were killed by the Croatian Ustaše regime.
• 1993 – The first version of Mosaic, created by computer programmers Marc Andreessen and Eric Bina at the National Center for Supercomputing Applications of the University of Illinois at Urbana-Champaign, was released, becoming the first popular World Wide Web browser and Gopher client.

More events: April 21 – April 22 – April 23