Continuity mistake: Gibbs holds up his father's WW2 era Hamilton watch and gives it to McGee. While McGee holds the watch to read the engraving on the caseback, the buckle strap is in McGee's right hand. In the closeup of the caseback the crown is at the bottom (which would mean the buckle strap is in McGee's left hand), but in the two shots facing McGee the crown is at the top (which would also make the engraving upside down while McGee reads it). (00:40:20)
Visible crew/equipment: At the tuxedo shop, after Tim's phone conversation with Delilah, when Ellie says, "I guess that's that, hey decision made," in the next shot facing Tim (he's standing in front of a trifold mirror), the reflection of the boom mic is visible at the top, right corner of the screen. (00:01:55)
Continuity mistake: When the helicopter lands on the helo deck there's a white aiming circle with a lineup line at the center, but after Gibbs and Palmer exit the helicopter the flight deck is again seen in a long shot, and the white lineup line is gone. (00:03:30)
Continuity mistake: When Gibbs and McGee are alone in the kitchen, in the closeups of McGee when he raises his left hand (such as when he takes the watch from Gibbs) he is not wearing a ring, but in the consecutive shots of the duo McGee is wearing a ring on his left hand (also odd, since it looks like McGee's wedding band). (00:39:10)
Visible crew/equipment: After Gibbs leaves McGee at the hospital, when it cuts to the bar with Palumbo at the pool table, there are multiple yellow and orange T-marks on the floor by the bar behind him. (00:27:15)
Chosen answer: It is never stated, however she must have been there several years if she is on presidential detail.