1. On September 15, 1830, the first steamboat constructed for use on the Great Lakes, the "Walk-in-the-Water," began its maiden voyage from Buffalo to Detroit. Its successful journey marked a significant milestone in the development of transportation in the region.

2. In 1883, the first "Electric Theatre," an early precursor to modern movie theaters, opened in Buffalo, New York on September 15th. The venue featured short movies projected on a screen, accompanied by live music and sound effects.

3. On September 15, 1956, the first transatlantic telephone cable went into operation, linking New York City and the United Kingdom. The cable, which was laid across the ocean floor, revolutionized global communication and paved the way for future advancements in telecommunications technology.

4. The iconic New York City restaurant, Tavern on the Green, opened its doors on September 15, 1934. Originally designed as a sheepfold in Central Park, the building was transformed into a restaurant in the 1930s and quickly became a beloved institution, famous for its luxurious atmosphere and celebrity clientele.

5. On September 15, 1963, four young African American girls were killed in a bombing at the 16th Street Baptist Church in Birmingham, Alabama. The tragic event, which became known as the "Birmingham church bombing," helped galvanize the Civil Rights Movement and inspire increased activism in New York and across the country.