The pilot episode Yankee White (2003) reused the Air Force One sets from Air Force One (1997). This is alluded to in the episode as an in-joke, when Agent Gibbs walks around the set pointing out to Agent Todd that the layout of Air Force One is exactly the same as in the movie of the same name.
Agent Gibbs alludes to a Secret Service agent that was a turncoat in the movie Air Force One. The traitor in that movie was named Agent Gibbs.
The episode title comes from the codename for the special security clearance needed to work aboard Air Force One or at the White House.
Harrison Ford, who was experiencing a bit of a slump around the time of the series's conception, was urged by colleagues to pursue the role of Gibbs. He did not, but Mark Harmon's Gibbs does allude to this in the first episode, name-dropping Harrison Ford and his film Air Force One (1997).
Rule No. 2: Always wear gloves at a crime scene.