1970s
1970:
Aswan high dam completed
There two dams, both across the Nile River in Aswan, Egypt. One is referred to as the high dam and the other is called the low dam. The first one (the low dam) was completed in 1902, and raised twice. The high dam was started in 1960 and was completed in 1970. it is 3830 miles long, 111 miles high, and 980 miles in width.
Beatles break up
It was not a single event, but a long transition. They went touring in 1966 and their manager died in 1967. after their manager died there was conflict in their artistic

opinion. Two members left the group at various times from 1968-1969 George Harrison and Ringo Starr. By 1970 all four band members were working on solo projects. Paul McCartney made the break up publicly known first when he came out with his first album. After John Lennon died in 1980 the rest of the group got together and made a final album in memory of him called “all those years ago”
Computer floppy disk introduced
The first disk was introduced in 1971. The disk was 8" in diameter with a magnetic coating, enclosed in a cardboard case with the capacity of one megabyte. Conversely to hard disks, the heads actually touch the disk, like in a cassette or video player that actually wears the media down over time.
Palestinian group hijacked five planes
June 27, 1970
248 passengers
12 crew
Injuries 10
Deaths 4
Survivors 256
Kent state shooting
Kent, Ohio
May 4, 1970 12:24pm
The Kent, Ohio National Guard fired 67 rounds over a period of 13 seconds targeting university students, killing 4 and injuring 9
1971: London Bridge brought to the U.S. 
United Kingdom changed to decimal system for currency
VCR’s introduced 
1972:
M.A.S.H. TV. show premiers
Mark Spitz wins seven gold medals
Born February 10, 1950 Mark Spitz won seven gold medals at the 1972 Munich Olympic games, between 1968-1972. Mark Spitz won 9 Olympic gold medals plus a silver and a bronze, 5 pan American golds, 31 U.S. amateur athletic union titles and 8 U.S. national college athletic association titles. During those years he set 33 world records and was named swimmer of the year in 1969, 1970, and 1972.
Pocket calculators introduced
In the early 1970s, the daily lives of people throughout the developed world were changed profoundly by the advent of a small electronic machine that could per-form basic mathematical problems much more quickly and more accurately than they could be worked out on paper. Calculators expanded the math capabilities of everyone from high school students to businessmen.
Terrorists attack at the Olympic games in Munich
Munich, West Germany on September 5-6, 1972 from 4:30am to 12:04am 17 total deaths. 11 Israeli athletes, 5 members of black September, and 1 West Germany police officer.
The black September organization was a Palestinian military secular group founded in 1970. it became it became notorious for this kidnapping.
Watergate scandals begins
In 1972, five men broke into the Watergate Complex in Washington, DC, and raided the office of the Democratic National Headquarters to steal strategic campaign files regarding Democrat George McGovern's bid for office in that year's Presidential election.
1973:
Abortion legalized in the U.S.
Illegal in 30 states
Legal in case of rape, in 1 state
Legal in case of damage to woman’s health in 2 states
Legal in case of damage to woman’s health, rape or incest, or likely damage to fetus in 13 states
Legal on request in 4 states, Washington is apart of this one
Sears tower built
This tower was completed in 1973. After this building was done being constructed the world had a new tallest building.
U.S. pulls out of Vietnam
President Nixon was elected on promise that more fighting would be turned over to the South Vietnamese army, and we would start bringing home American troops.
The United States did not lose the Vietnam War. Although some think we did because we pulled out of South Vietnam. In 1972, North Vietnam finally realized that the war was a stalemate. The two sides met and arranged a cease fire. In January of 1973 the Paris Accords went into effect. The US agreed to withdraw all its troops from Vietnam in 60 days. Congress had stopped funding the war effort. The North Vietnamese government agreed to release all prisoners, which they never did.
U.S. vice president resigns
During his fifth year as Vice President, in the late summer of 1973, Agnew was under investigation by the United States attorney's office in Baltimore, Maryland, on charges of extortion, tax fraud, bribery and conspiracy. In October, he was formally charged with having accepted bribes totaling more than $100,000, while holding office as Baltimore County Executive, Governor of Maryland, and Vice President of the United States.
1974:
Haile Selassie, emperor of Ethiopia, deposed
Patty Hearst kidnapping 
2/14/74 19 year old Patricia Hearst was kidnapped by a group called Symbionese Liberation Army. Kidnapped for 56 days locked in a closet while being physically and sexually abused. The terrorists wanted to exchange prisoners.
Terracotta Army discovered in china
("soldiers and horse funerary statues") is

the Terra Cotta Warriors and Horses of Qin Shi Huang the First Emperor of China.. The terracotta figures, dating from 210 BC, were discovered in 1974 by some local farmers near Xi’an, Shaanxi province, China. The figures vary in height (183–195 cm - 6 ft–6 ft 5in), according to their roles, with the tallest being the generals. The figures include warriors, chariots, horses, officials, acrobats, strongmen, and musicians.
U.S. president Nixon resigns
President Nixon didn’t resign before the U.S. Supreme Court started. United States v. Nixon, (1974) was argued on July 8, 1974, and decided sixteen days later, on July 24, 1974. Nixon resigned to avoid impeachment on August 9, 1974, several weeks after the Supreme Court issued its decision. Impeachment is carried out by the House of Representatives, not the Supreme Court. President Nixon endured two years of bitter public debate over the Watergate scandals. After those two years he bowed to pressures from the public and leaders of his party to become the first President in American history to resign.
He had hopes that his resignation would have helped to start of the process of healing which he thought America desperately needed.
Mr. Nixon said he decided he must resign when he concluded that he no longer had "a strong enough political base in the Congress" to make it possible for him to complete his term of office.
Nixon had said that America needed a full-time President and a full-time Congress and with him still standing in the presidential position, he couldn't put America first and that America just couldn't survive with a half-time president.
1975:
Arthur Ashe first black man to win Wimbledon
Born: 10 July 1943
Birthplace: Richmond, Virginia
Died: 6 February 1993 (AIDS)
Arthur Ashe was a tennis star of the 1960s and '70s and an African-American pioneer: the first black man to win at the U.S. Open and Wimbledon. He scored many other firsts in his career, including becoming the first African-American on the U.S. Davis Cup team in 1963. Ashe played tennis at UCLA and was national collegiate champion in 1965. He won three major tournaments in his career: the U.S. Open (1968), the Australian Open (1970) and Wimbledon (1975). Ashe retired in 1980 and was elected to the Tennis Hall of Fame in 1985. In 1988 he discovered he had AIDS, probably having gotten the HIV virus from a blood transfusion during heart surgery in 1983. Ashe made the news public at a 1992 press conference and died the next year.
Civil war in Lebanon
The war lasted from 1975-1990 130,000 to 250,000 civilians died another one million people (1/4 of the population) were wounded and half were left with lifetime disabilities.
Microsoft founded
Pol Pot became the communist dictator of Cambodia
Pol pot was the leader of the Cambodian communist movement known as Khmer Rouge, and he was prime minister of democratic Kampuchea from 1976-1979 (his time as the leader of Cambodia) in which he attempted to cleanse the country resulted in 1.7 to 2.5 million peoples deaths.
1976:
Nadia Comaneci given seven perfect tens
The first gymnast ever to be awarded a perfect score of ten in an Olympic gymnast event. She is also a winner or two gold medals she won in 1980, and known as one of the best gymnasts in the world.
Vietnam
North and South Vietnam join to form the Socialist Republic of Vietnam
Tangshan earthquake
July 28, 1976 the largest earthquake of the 20th century according to death toll occurred
1977:
Elvis found dead
Elvis Presley died on August 16, 1977 he was found in his home, in the bathroom several hours after death by his girlfriend Ginger Alden. His case of was announced to be an irregular beating of the heart, resulting from myocardial infarction his real cause of death was from an eating disorder.
Miniseries roots airs
Roots remains one of television's landmark programs. The twelve-hour mini-series aired on ABC from January 23-30, 1977. For eight consecutive nights it riveted the country. At first ABC workers feared that the historical saga about slavery would be a ratings disaster. Instead, Roots scored higher ratings than any previous entertainment program in history. It averaged a 44.9 rating and a 66 audience share for the length of its run.
South African Anti Apartheid leader Steve Biko tortured to death
before after

Steve Biko died of head wounds in policy custody on September 12 1977. The police first claimed he died of hunger strike, but later changed their story to say he hit his head against a wall in a scuffle. But

Steve Biko's supporters believe he was deliberately killed, and the police are still trying to cover up the truth.
Star wars movie released
1978:
First test tube baby born
Since 1966, Dr. Patrick Steptoe, a gynecologist at Oldham General Hospital, and Dr. Robert Edwards, a physiologist at Cambridge University, had been actively working on finding an alternative solution for conception for women with blocked Fallopian tubes. However, even after they found a way to fertilize an egg outside a human body, they continued to have problems replacing the fertilized egg back into a uterus. On July 25, 1978, Louise Joy Brown, the world's first successful "test-tube" baby was born in Great Britain.
John Paul the second becomes pope
Jonestown massacre
Thirty two years ago, on Nov. 18, 1978, 909 Americans were killed by the Rev. Jim Jones in a mass murder-suicide pact in a South American jungle, shortly after Jones' gunmen killed a visiting U.S. congressman and four others at a nearby airstrip. Of the nearly 1,000 church members who began the day in Jonestown, a cult commune, only 33 survived to see the next day.
Margaret Thatcher first woman prime minister of Great Britain
Margaret Hilda Thatcher, (born 13 October 1925) served as Prime Minister of the United Kingdom from 1979 to 1990 and Leader of the Conservative Party from 1975 to 1990. She is the only woman to have held either post.
Mother Teresa awarded the noble peace prize
Mother Teresa's Missionaries of Charity continued to expand, and at the time of her death it was operating 610 missions in 123 countries, including hospices and homes for people with HIV/AIDS, leprosy and tuberculosis, soup kitchens, children's and family counseling programs, orphanages, and schools.
Nuclear accident at Three Mile Island
The Three Mile Island nuclear accident was caused by faulty equipment and also by incorrect(operator) response to the situation.
Sony introduces the walkman
- The world took a big step towards the iPod generation when Sony introduced the Walkman in 1979.