Massacre at Mystic: May 26, 1637
Shays' Rebellion: America's first civil war, January 25, 1787
Gold rush: January 24, 1848
Antietam: September 17, 1862
The homestead strike: July 6, 1892
Murder at the fair: the assassination of President McKinley: September 6, 1901
Scopes: the battle over America's soul, July 21, 1925
Einstein's letter: July 16, 1939
When America was rocked: September 9, 1956
Freedom summer: June 21, 1964.