1. On July 30, 1775, a group of American troops led by Colonel Henry Knox dragged 59 pieces of artillery from Fort Ticonderoga in New York to Boston, helping the Americans gain a tactical advantage in the Revolutionary War.

2. In 1890, Massachusetts became the first state to require automobiles to be registered and display a number plate. The plates were made of iron and displayed just the owner's initials and number.

3. On July 30, 1918, the Massachusetts legislature passed a law allowing women to serve on juries, making it the first state to grant women such a right.

4. The first public radio broadcasting station in the United States was WGI in Massachusetts, which began operating on July 30, 1920.

5. On July 30, 1975, former Teamsters Union president Jimmy Hoffa disappeared from a restaurant parking lot in Bloomfield Township, Michigan. Although Hoffa's body has never been found, many theories suggest that he was killed in retaliation for his union activities.