Continuity mistake: When Gibbs has the Mafia boss against the car, his arm is across the Mafia guy's chest. Camera cuts and now it is right next to his neck. (00:34:50)
Continuity mistake: Just after Fornell is arrested, the agents are showing NCIS their surveillance of the mafia. When doing so, the headset on the one agent changes position instantly. (00:22:00)
Continuity mistake: The amount of sandwich Tony has eaten when Abby is being hacked is constantly changing instantly. (00:13:00)
Chosen answer: It is never stated, however she must have been there several years if she is on presidential detail.