September Dawn

The Mountain Meadows Massacre, as it is known, occurred on September 11, 1857, and was the first known act of religious terrorism on U.S. soil. More than 120 men, women and children were murdered by a group made up of the Utah territory militia and Paiute Indians. One man, the adopted son of Mormon leader Brigham Young, was eventually executed for the crime... 20 years after the event.