Harold Callahan

Harold Callahan was a magnum toting Pentagon internal security officer and member of the United States Army in 2077.

Background
While serving as a member of the Pentagon's internal security, Callahan recorded several incidents in his personal terminal.

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

Behind the scenes
Harold Callahan (along with his magnum sidearm) is a cultural reference to Harry Callahan, protagonist of the Dirty Harry series of movies.