1. AP US History This Day in American History November 18 1863 - President Abraham Lincoln boards a train for Gettysburg, Pennsylvania, to deliver a short speech at the dedication of a cemetery of soldiers killed during the battle there on July 1 to July 3, 1863. The address Lincoln gave in Gettysburg became one of the most famous speeches in American history.

2. AP US History This Day in American History November 18 1883 – At exactly noon on this day, American and Canadian railroads begin using four continental time zones to end the confusion of dealing with thousands of local times. The bold move was emblematic of the power shared by the railroad companies.

3. AP US History This Day in American History November 18 1978 – Peoples Temple founder Jim Jones leads hundreds of his followers in a mass murder-suicide at their agricultural commune in a remote part of the South American nation of Guyana. Many of Jones’ followers willingly ingested a poison-laced punch while others were forced to do so at gunpoint. The final death toll at Jonestown that day was 909; a third of those who perished were children.

4. AP US History This Day in American History November 18 1987 – After nearly a year of hearings into the Iran- Contra scandal, the joint Congressional investigating committee issues its final report. It concluded that the scandal, involving a complicated plan whereby some of the funds from secret weapons sales to Iran were used to finance the Contra war against the Sandinista government in Nicaragua, was one in which the administration of Ronald Reagan exhibited "secrecy, deception, and disdain for the law."