Articles on 1970s in the United States, Including - Apollo Program, Zodiac Killer, List of California Ballot Propositions 1970 "1979, Sharpstown Scandal, Eisenhower Dollar, Original Night Stalker, FBI Ten Most Wanted Fugitives, 1970s (Paperback)

Please note that the content of this book primarily consists of articles available from Wikipedia or other free sources online. This section of the Timeline of United States history concerns events from 1970 to 1989. *1970 - The first Earth Day is observed. *1970 - American Top 40, hosted by radio personality Casey Kasem, becomes the first successful nationally syndicated radio program featuring a weekly countdown. *1970 - The Occupational Safety and Health Act, or OSHA, is signed into law. *1971 - A ban on radio and television cigarette advertisements goes into effect in the United States *1971 - 26th Amendment ratified, allowing 18-year-olds to vote *1972 - President Richard Nixon visits China, an important step in formally normalizing relations between the United States and China. *1972 - Watergate scandal: Five men arrested for the burglary of the Democratic National Committee headquarters at the Watergate office complex in Washington, D.C. *1972 - Apollo 17 flies to the Moon, and becomes the last manned mission there (as of 2010) *1973 - Roe v. Wade Supreme Court ruling overturns state laws against abortion *1973 - Skylab launched as the USA's first space station *1973 - Watergate scandal: President Nixon fires three Attorneys General over disposition of the secret tapes and the actions of the Special Prosecutor. *1974 - The Super Outbreak, the largest series of tornadoes in history (at 149), hits 13 U.S. states and one Canadian province; 315 people are killed and more than 5,000 are injured. *1974 - Watergate scandal: The House Judiciary Committee votes to impeach the President *1974 - Watergate