The show was originally conceived as a look at how the CIA was surviving in the post-Cold War era. When the World Trade Center was destroyed, it changed the entire focus of the show and required the replacement of the character of Alex Pierce. See more
You know, my daddy told me "When you go to war, always carry an American gun. That way, if you're captured, you tell them 'When my grandfather went to Germany to fight the Nazis, he carried this pistol, and it never jammed on him once.' And then you tell them 'When my father went to Vietnam to fight the Cong, he carried this pistol, and it never jammed on him once.' And while you're telling them this
[pulls a Glock from an ankle holster
you shoot them with an Austrian gun and come home alive.