Tet Offensive (Jan. 31): North Vietnamese forces launch a fierce offensive against numerous targets in South Vietnam at the start of Vietnamese Tet new year. Caught off guard, South Vietnamese and U.S. forces rally and expel Communist troops from Saigon, Hue and other strategic points.

	Johnson

Blood on Their Hands (March 16): At a South Vietnamese hamlet called My Lai, a massacre is carried out by members of Charlie Company, 11th Brigade, Americal Division. The soldiers are accused of killing at least 109 and possibly 567 civilians -- including babies.

Bowing Out (March 31): President Johnson stuns Americans by announcing on TV, "I shall not seek, and I will not accept, the nomination of my party for another term as your president."

Blow to Civil Rights (April 4): Martin Luther King Jr., 39-year-old prophet of non-violence and racial brotherhood, is gunned down in Memphis on the second-floor balcony of the Lorraine Motel. The assassination triggers rioting in more than 100 communities, resulting in 46 deaths. Illinois-born James Earl Ray, a white man, is arrested June 8 in London as he is about to fly to Belgium.

	Kennedy

Another Assassination (June 5): The nation is rocked by the shooting of Sen. Robert F. Kennedy in Los Angeles on the night he wins the California primary in his quest for the Democratic presidential nomination. As Kennedy fights for his life, the assailant is identified as Sirhan Bishara Sirhan, 24, a Palestinian-American protesting American support of Israel. Kennedy dies early June 6.

Convention Clash (Aug. 27): The Democratic convention in Chicago proves to be the most violent in U.S. history. About 3,000 anti-war demonstrators clash with police and Illinois National Guardsmen outside the hotel where many delegates are staying. A five-block stretch becomes a battle zone, and police use clubs and tear gas against the protesters. They, in turn, hurl rocks and bottles, overturn trash cans and break car windows.

Tick, Tick, Tick, Tick (Sept. 24): CBS airs a new television news magazine called "60 Minutes."

The Troubles (Oct. 5): Sectarian hatred explodes in Northern Ireland when 400 Catholic demonstrators defy a British ban against marches in Londonderry. Riot police assault the crowd with clubs, leaving scores injured. The encounter sets off a new and deadly round of violence between Catholics and Protestants.

	Ono

Lennon Lewd? (Oct. 13): The release of Apple Records' "Two Virgins," featuring John Lennon and wife Yoko Ono nude on the cover, causes a furor.

Jackie O (Oct. 20): Jacqueline Kennedy marries Greek shipping magnate Aristotle Onassis.

Nixon Wins (Nov. 5): Richard M. Nixon is elected the 37th U.S. president. Also, Shirley Chisholm, a New York Democrat, becomes the first black woman to serve in Congress.