Harold Callahan

Harold Callahan was a Magnum toting, Pentagon internal security officer and member of the U.S. Army in 2077.

Background
Armed with his .44 Magnum revolver, Callahan was a member of the U.S. Army, stationed at the Pentagon as a security guard in the months leading up to the Great War.

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.