1. On September 29, 1780, Benedict Arnold successfully led British troops in an attack on a Patriot supply depot in West Point, New York. Arnold had previously been a general in the Continental Army, but defected to the British army after feeling unappreciated and mistreated by his American superiors.

2. The first public library in the United States, the Boston Public Library, was officially dedicated on September 29, 1852. It was the first free municipal library in the country and set a precedent for future public library systems across the United States.

3. On September 29, 1962, the Boston Symphony Orchestra performed at the grand opening of the Kennedy Center for the Performing Arts in Washington, D.C. President John F. Kennedy, for whom the center was named, was a lifelong fan of classical music and had a special connection to the Boston Symphony Orchestra.

4. The deadliest disaster in aviation history at the time occurred on September 29, 1956, when two commercial airplanes collided over the Grand Canyon in Arizona, killing all 128 passengers and crew members aboard both planes. Among the victims were 50 residents of Massachusetts.

5. September 29, 2006 marked the grand opening of the Boston Convention and Exhibition Center, a massive, state-of-the-art facility that has hosted numerous high-profile events and conventions over the years. The center is a major economic driver for the city of Boston and the state of Massachusetts, generating billions of dollars in tourism revenue each year.