Continuity mistake: At the start, when DiNozzo is explaining what's up with Gibbs, McGee has his hands on his keyboard as if typing. When the shot changes, he's now moving his keyboard by the sides. (00:03:00)
Continuity mistake: When Gibbs and his dad are driving and Gibbs asks if his dad has eaten since yesterday, his arm is either out the window or down by his side depending on the shot. (00:10:50)
Continuity mistake: Gibbs says about the waitress taking things personally in the diner. When he says this, he gestures with his thumb, which turns into an index finger in the shot without time to switch. (00:12:20)
Continuity mistake: When DiNozzo is on the phone at McGee's desk, he is fiddling with something that is on an open folder/file of a suspect. When the shot changes, this item has gone. (00:15:20)
Continuity mistake: When Tony is sitting at McGee's desk talking to Delilah, Tony's holding the phone to his left ear with his left hand, but in the overhead shot Tony's holding the phone to his right ear with his right hand. (00:15:50)
Chosen answer: It is never stated, however she must have been there several years if she is on presidential detail.