Continuity mistake: When Tony enters the NCIS interrogation room with Fornell, he sits down and places his bag of potato chips on the table. In the next shot, the bag has disappeared, he removes it from his jacket pocket, and places it on the table again. (00:25:15)
Continuity mistake: When Gibbs is comparing McGee to the FBI agent's ID badge, Gibbs' left hand disappears from the bottom of the badge. (00:16:10)
Continuity mistake: Just as Vance says about Abby being smarter than Fornell gives her credit for, he is holding his toothpick. Camera cuts and he is no longer holding it. (00:22:15)
Continuity mistake: Ziva is tasked to go outside to the FBI car and she goes upstairs passing a wooden support. Camera cuts and she passes the support again. (00:20:35)
Continuity mistake: When Vance is packing up to leave at the end of the episode, he opens a red folder on his desk. When Jenny enters the office a moment later, the folder is instantly on top of Vance's briefcase. (00:41:45)
Chosen answer: It is never stated, however she must have been there several years if she is on presidential detail.