Harold Callahan

Harold Callahan was a Military Police officer stationed at the Pentagon in 2077.

Background
Armed with his .44 Magnum revolver, Callahan was stationed at the Pentagon as an MP in the months leading up to the Great War. He responded to several incidents amongst Pentagon staff, such as General Robert Dobbs' shooting of a Nuka-Cola vending machine.

Appearances
Harold Callahan is mentioned only in the Fallout 3 add-on Broken Steel.

Behind the scenes
The character (along with his Magnum sidearm) is a reference to San Francisco Inspector Harry Callahan, protagonist of the Dirty Harry series of movies, who is noted for using a .44 Magnum as his weapon of choice as opposed to the standard police issue .38 caliber six shooter. The game guide also uses the classic line from the film as a means to showcase the power of the Magnum.