Sic Semper Tyrannis

Sic Semper Tyrannis is a perk added in the Gun Runners' Arsenal DLC for Fallout: New Vegas.

Obtaining
Kill President Kimball with any One-Handed Pistol.

Behind the scenes

 * The name of this perk is a reference to the assassination of Abraham Lincoln. The assassin, John Wilkes Booth, yelled the phrase before shooting the President with a Philadelphia Derringer.
 * The phrase is Latin for "thus always to tyrants." It is also the Virginia state motto.