Continuity mistake: When the victim falls to the ground in the pre-title sequence his eyes are closed and a pool of blood spills onto the floor from his mouth. When Tony and Ziva are examining the body and taking photo's of the victim, his eyes are now open and the pool of blood is gone from by his mouth. (00:00:50 - 00:03:10)
Visible crew/equipment: When Gibbs and Ziva enter Second Chances to question the owner about Curtis, in the overhead shot Gibbs stops beside the counter, and the red tape mark is visible on the floor between his feet. (00:18:20)
Chosen answer: It is never stated, however she must have been there several years if she is on presidential detail.