The Irish Republican Brotherhood launched the "Easter Rebellion," an armed uprising against oppressive British rule.
The Oklahoma explosion (caused by a detonated truck bomb) took 168 lives including 19 children, and injured 680 people.
Today marks the 75th anniversary of Superman's first appearance in DC's Action Comics No. 1, published April 18, 1938.
Randolph played a leading role in the fight for civil and labor rights, from the 1930s through the 1960s.
She is best known for having written the folk song "Which Side Are You On?," which she wrote at the age of twelve while her father was out on strike with other coal miners.
Today in 2006, tens of thousands of immigrants demonstrated in 100 U.S. cities in a national day of action billed as a campaign for immigrants' dignity.
On April 8, 1935, with the nation in the depths of the Depression, Congress voted to approve the Works Progress Administration.
On this day in 1989, the United Mine Workers began their historic strike against Pittston Coal.
An assassin's bullet felled the Rev. Martin Luther King, Jr. on April 4, 1968. King had come to Memphis to support a strike by the city's sanitation workers.
Striking silk mill workers in Paterson, New Jersey were increasingly at odds with police, who repeatedly crushed their efforts to hold rallies.