I could look again at the radar track and tell you, but my guess is it was 17500 or 16500 since his RA forced him into positive control airspace. His relative altitude to the 16 was within a few hundred feet as evidenced by the RA itself. My point was that a 180 degree turn towards the ga and the resultant RA demonstrates an aggressive and impulsive move on the part of the 16. Now I will be honest with you and say that if I was 20 something in a 16 and thought I could turn on a corp jet without him knowing it and lock him up with my targeting radar, I would have been tempted. It would have been the wrong thing to do though, wouldn't you agree?