1841 - The Erie Railroad rolled out its first passenger train.
1859 - Charles Blondin became the first person to cross Niagara Falls on a tightrope.
1921 - The Radio Corporation of America (RCA) was formed.
1934 - Adolf Hitler purged the Nazi Party by destroying the SA and bringing to power the SS in the "Night of the Long Knives."
1936 - Margaret Mitchell’s book, "Gone with the Wind," was published in New York City.
1950 - U.S. President Harry Truman ordered U.S. troops into Korea and authorizes the draft.
1953 - The first Corvette rolled off the Chevrolet assembly line in Flint, MI. It sold for $3,250.
1958 - The U.S. Congress passed a law authorizing the admission of Alaska as the 49th state in the Union.
1962 - Los Angeles Dodger Sandy Koufax pitched his first no-hitter in a game with the New York Mets.
1970 - The Cincinnati Reds moved to their new home at Riverfront Stadium.
1971 - The Soviet spacecraft Soyuz 11 returned to Earth. The three cosmonauts were found dead inside.
1974 - The July 4th scene from the Steven Spielberg movie "Jaws" was filmed.
1984 - The longest professional football game took place in the United States Football League (USFL). The Los Angeles Express beat the Michigan Panthers 27-21 after 93 minutes and 33 seconds.