1966Jan. 17-A massive search is on for an H-bomb that dropped into the Atlantic when an American B-52 bomber collides with another aircraft.
March 22-The president of GM apologizes before a congressional committee for a company-ordered investigation of the private life of Ralph Nader, a crusader for safer cars, following the publication of Unsafe at Any Speed.
April 14-The Sandoz Corp. of Switzerland suspends distribution of LSD.
May 28-On American campuses, students picket, march and sometimes riot against the war. In Saigon, Buddhists set themselves ablaze. About 350 students seize control of administrative offices at the University of Chicago, protesting against the college's cooperation with the Selective Service.
Nov. 8-Ronald Reagan is elected governor of California. Edward Brooke is the first black elected to the Senate.
1967Jan. 27-Astronauts Virgil Grissom, Edward White and Roger Chaffee are killed in a flash fire that engulfs their Apollo I spacecraft during a simulation of their scheduled February launch.
April 21-A military junta seizes power in Greece and arrests left-wingers.
April 30-Muhammad Ali is stripped of his world heavyweight boxing title for refusing to be inducted into military service for religious reasons.
May 16-French President de Gaulle says he will block the latest British application to join the Common Market.
Aug. 30-Thurgood Marshall becomes the first black U.S. Supreme Court justice.
Oct. 10-Military authorities in Bolivia confirm the death of Che Guevara, the underground revolutionary leader and hero to popular movements in Central and South America. His body is displayed at a news conference.
1968Jan. 31-North Vietnamese and Viet Cong forces launch the massive Tet offensive. An estimated 84,000 Communist combat troops, and an equal number of support forces strike virtually all of the provincial capitals and major cities in the South.
April 4-Martin Luther King Jr. is killed by a sniper's bullet as he relaxes on a balcony at the Lorraine Hotel in Memphis.
May 30-In France, the trains are not running and the airports are closed. Millions of workers have barricaded themselves inside factories and offices. Hundreds of thousands of students close schools as the country stands on the brink of Civil War.
Nov. 5-Eight years after his narrow defeat by President Kennedy, Richard Nixon squeaks past Hubert Humphrey.
1969Feb. 13-In Britain, scientists say they have successfully fertilized human eggs in a test tube.
March 17-Golda Meir, 71, who once taught school in Milwaukee, is sworn in as Israel's fourth premier.
July 8-In accord with President Nixon's plans for gradual disengagement from Vietnam and for turning over the burden of the fighting to the South Vietnamese, the first American combat unit leaves Saigon.
July 20-American astronauts Neil Armstrong and Edwin Aldren Jr. land on the moon. Soon after, Armstrong steps from the lunar lander, saying, "That's one small step for man, one giant step for mankind."
Aug. 9-Cult leader Charles Manson and his followers invade the home of Sharon Tate and ritualistically slaughter her four guests.
Aug. 17-A massive gathering estimated at 400,000 survive endless traffic jams, food and water shortages and torrential downpours to proclaim the Woodstock Music and Arts Fair a success.
Nov. 30-A 20-month-old story is emerging from a village in South Vietnam called Mylai where nearly 600 residents are reportedly slaughtered by an American platoon. Survivors say many of the victims were women and young children.
1970Feb. 28-The seven defendants in the circus-like Chicago conspiracy trial and their lawyers walked out of a federal appeals court on bond. After a trial almost as divisive as the street fighting before the 1968 Democratic convention, the jury reached a split verdict. The seven, including Abbie Hoffman and Jerry Rubin, and their lawyers, William Kunstler and Leonard Weinglass, were sentenced to terms of up to four years for contempt. A defense lawyer screamed at the judge, "You are a racist, a fascist and a pig."
April 10-Paul McCartney marks the end of an era when he announces he's leaving the Beatles, thereby disbanding the most successful pop group in history.
April 30-President Nixon announces that he has sent American combat troops into Cambodia. In a speech, Nixon describes the action as "not an invasion of Cambodia" but a necessary extension of the war describes to protect American servicemen and shorten the war.
May 4-National Guardsmen fire into a crowd of Kent State University students, killing two women and two men and wounding eight others.
Sept. 14-More than 50 airline passengers from five countries are being held by a Palestinian splinter group demanding the release of hundreds of prisoners. Earlier in the week, the gunmen blew up the three planes the passengers had boarded in Europe.
Sept. 18-Rock musician Jimi Hendrix dies in London of a drug overdose at 27.
Oct. 4-Janis Joplin dies in Hollywood of a drug overdose at 27.
1971Jan. 29-All charges against enlisted men accused in connection with the Mylai massacre in Vietnam are dropped. The Army also dropped charges against Maj. Gen. Samuel Koster, the division commander who had been accused of trying to cover up the massacre.
Feb. 4-Rolls Royce Ltd. declares bankruptcy.
Feb. 13-Vice President Spiro Agnew steals the spotlight from Arnold Palmer at the Bob Hope Classic by hitting three spectators with his first two shots, then driving off in his golf cart in disgust.
March 31-The longest war crimes trial in American history ends with Lt. William Calley being sentenced to life at hard labor for his role in the Mylai massacre. On April 6, President Nixon orders his release until he decides Calley's fate himself.
April 24-About 700 veterans from Vietnam Veterans Against the War toss their medals away in protest at the Capitol.
June 30-The Supreme Court overrules government attempts to stop The New York Times and The Washington Post from publishing articles based on a secret Pentagon study of the Vietnam War. All nine justices write separate opinions.
Nov.-Led Zeppelin cuts its second album, including the hit "Stairway to Heaven." One poll has them surpassing the Beatles the previous year in popularity.