Visible crew/equipment: After Abby tells Tony that he's "like a piercing, it takes awhile for the throbbing to stop..." as Gibbs asks her about the theory, the reflection of a crew member wearing a white short-sleeve shirt is visible on the glass. (00:19:40)
Visible crew/equipment: While Gibbs and Caitlin are alone with Lt. Roberts trying to gain access to the Armed Forces Registry, just as Roberts acknowledges the critical 48 hours, the reflection of a crew member (presumably camera operator) is visible in the mirror, on the right side of the screen. (00:22:20)
Chosen answer: It is never stated, however she must have been there several years if she is on presidential detail.