Day 2: 12:00 Noon-1:00 P.M. - S2-E5
Revealing mistake: The Fox news video that Palmer watches of the Ambassador's helicopter being shot down is marked 1:18:24 in the lower right hand corner. The episode is supposed to take place between Noon and 1 p.m. This is 41.47 into the episode.
Answer: According to Jack in season 5, Nina was "deep cover" before the pair ever met, so it's safe to assume she was recruited before she joined CTU. As for what her primary mission was, who knows? Perhaps it was to gather sensitive intel and pass it on to her superiors. Given that she worked for an intelligence agency, it's not a stretch. Or perhaps we may find out in season seven.
Cubs Fan ★