technically the aircraft in the picture is a Northrop F5F (judging by the size of the radome) or an F5B, not a T38.
You are easily forgiven however as the F5 series is directly related to the T38 - the F5A and the T38 were developed concurrently from Northrop's "Light Fighter" program.
Iran operates F5A, F5B, F5E, F5F and apparently 2 single seat "home built versions" HESA Saeqeh - Wikipedia