Bill Clinton stated that Ahmadinejad's behavior may be just youthful excess and at any rate it depends on what one's interpretation of assassinate is.
Look closely. A real "Great Satan" leads Iran.
This guy gets around.
Now it's getting interesting!
What doesn't change is the fold/crease between the upper check and the nose.
Look at that crease/fold line between the upper cheek and nose on all of the photos of the top row. The crease/fold line appears to be same in the old pictures and the new pictures, from it starts from the nose, length of the crease and position on the face.
Last but not least is the hair style and grooming of the man 25 years ago is similiar to the man today. The older photos show a man who had his hair professionally done versus the normal scraggy look of young Jihadist in that area from 25 years ago to today. He is dressed in a nice sportcoat in many photos, and he wears a turtle neck which is coordinated. That was not very typical of the average university jihadist when our embassy people were held captive.
If the photos are not the same man over time, then the earlier photos are possibly photos of a cousin or brother. Remember how, so many of Saddam's cousins and brothers looked alike with similiar features. They came from the same city, Tikrit.