Apr. 6. 1968: In wake of riots following M.L. King's assassination, Oakland police raid Black Panther Party headquarters, killing Bobby Hutton and wounding three others, including Eldridge Cleaver. 1996: Eleven arrested at main post office near Capitol Hill, Washington, D.C., for attempting to mail needed medical supplies to Iraq in defiance of U.S.-led embargo.

Apr. 7. 1948: World Health Organization (WHO) formed in Geneva, with the stated goal of making health care available to everyone in the world by the year 2000. 1991: Over 5,000 rally against police brutality in Los Angeles.

Apr. 8. 563 BC: Birth of Gautama Buddha. 1712: Slave revolt, New York City. 1973: A Harris Poll reports 51% in U.S. support the American Indian Movement protesters occupying Wounded Knee; 21% support the federal government.

Apr. 9. 1754: Letter from Indian slave trader to South Carolina Gov. J. Glenn asking for permission to use one group of Indians to fight another: "We want no pay, only what we can take and plunder, and what slaves we take to be our own." 1947: First day of Freedom Ride, the "Journey of Reconciliation," sponsored by Congress for Racial Equality and Fellowship of Reconciliation, from Washington, D.C. through four southern states. 1969: Harvard students take over the campus administration building, ousting the deans. 1995: Over 100,000 at Rally for Women's Lives, Washington D.C.

Apr. 10. 1919: Peasant leader Emiliano Zapata ambushed and assassinated by Mexican Federal troops. 1947: Jackie Robinson appears in first game with the Brooklyn Dodgers, becoming the first African-American to play major league baseball after 78 years of segregation. The game, until a franchise moved to Atlanta in the mid-'60s, was played entirely in northern cities. 1971: 90-year-old Jeanette Rankin, the first U.S. Congresswoman (in 1917) and the only member of Congress to vote against U.S. entry to both World Wars, leads 8,000 women in march on Pentagon to protest war in Vietnam. 1995: California judge rules that assault-type weapons manufacturers can be sued for carnage resulting from the product's use.

Apr. 11. 1968: Civil Rights Act of 1968 signed into law. The act bars racial discrimination in housing and other areas. 1986: Seventeen are arrested on felony riot charges after police tear-gas striking Hormel meatpacking workers in Austin, Minn. 6,000 (in a city of 20,000) demonstrate the next day. The Hormel strike, generally regarded as labor's first major grassroots revolt against corporate downsizing, is eventually suppressed by Hormel in cooperation with both the state and the workers' own national union. 1996: Treaty of Pelindaba signed in Cairo, making Africa a nuclear-free continent and at least in theory making the entire southern hemisphere a nuclear-free zone.

Apr. 12. 1935: 60,000 college students around the U.S. go on strike against war. 1967: 1,500 march down the Ave. in Seattle's U-District in opposition to Vietnam War.