The Kent State shootings are a long-remembered symbol of government gone amok with its power and fear of its own people.
The Pentagon commemoration omits contributions of the peace movement "on the home front" that helped bring an end to the war.
On this date in 2013, the first Moral Monday was held in Raleigh, the North Carolina state capital.
Lee Cain was a powerful orator who had toiled for years at the Dodge Main plant and was a leader of the Black Caucus of the UAW.
On this date in 1965, Washington, D.C. saw the first major demonstration against the Vietnam War.
On this date in 1990, exactly 25 years ago, a graphic designer named Dan Wilkins founded a firm called The Nth Degree.
The death toll is estimated at perhaps as many as 750,000, out of a total U.S. population of only 30 million at the time.
Frank Kameny ran for U.S. Congress on this date in 1971, albeit for a non-voting seat representing the District of Columbia.
Once upon a time there existed moderate, even in certain ways progressive Republicans.
"What a glorious task we are given," said Obama. "We know the march is not yet over, the race not yet won. Change depends on what we do."