1864 – Atlanta falls to Union forces during the Civil War (More info)

1897 – The Boston subway opens, becoming the first underground rapid transit system in North America (More info)

1985 – A joint US-French expedition locates the wreckage of the Titanic several hundred miles off the coast of Newfoundland (More info)

1939 – Nazi Germany and Slovakia invade Poland, beginning World War II (More info)

1998 – The federal law requiring all cars and light trucks sold in the US to have air bags on both sides of the front seat goes into effect (More info)