<human>:  Explain the significance of the phrase “The Shot Heard Round the World”.
<bot>: The phrase “The Shot Heard Round the World” is a reference to the opening shots of the American Revolutionary War. The phrase is often used to commemorate the famous event and to honor and remember the brave men and women who fought in the war for independence. At the onset of the conflict, a signal cannon fired by Colonel Paul Revere in the town of Lexington, Massachusetts set off a chain reaction of events that ultimately led to the formation of the United States. Therefore, the phrase “The Shot Heard Round the World” symbolizes the start of American independence.