Agent Afloat - S6-E2
Trivia: Season 6, "Agent Afloat": Maybe real aircraft carriers posing as fictional ones shouldn't let viewers see their registration numbers. When this episode aired, producers heard from several "carrier purists" complaining that CVN74 is the U.S.S. John C. Stennis, not the (non-existent) Seahawk.
Murder 2.0 - S6-E6
Trivia: When the 3rd victim dies in the interrogation room, McGee is instructed to call Base Medical. When he moves the phone from his ear and says "Tony" you can see the default screen for the iPhone requesting it be plugged in to iTunes for setup.
Trivia: In the season six episode "South by Southwest", Tony mentions the film Scent of a Woman and leading co-star Chris O'Donnell. O'Donnell made a special guest appearance later in the season as G Callen, in the crossover episode that introduced the characters of NCIS: Los Angeles.
Broken Bird - S6-E13
Trivia: The two actors playing Mr. Pain are father and son, William Morgan Sheppard and Mark Sheppard.
Chosen answer: It is never stated, however she must have been there several years if she is on presidential detail.