Dow Record-Timeline

This combination of Associated Press file photos shows from left, crowds panicking in Manhattan's financial district on Oct. 24, 1929, in New York, and right, Dr. Fridtjof Nansen on Oct. 28, 1929. On Monday, Oct. 28, 1929, the Dow lost nearly 13 percent, starting the Great Depression. On the same day, the International Society for the Exploration of the Arctic Regions by Means of Aircraft announced plans for a spring exploration to be led by Norwegian explorer Fridtjof Nansen. (AP Photo/File)