It seemed unlikely that an ambitious political extremist who was the right age at the time would miss the opportunity to participate in the embassy takeover. But the intelligence photo analysts said it was not him, and I believed it, not because I believe the analysts, but because Ahmedinejad has weak looking facial bone structure and the embassy guy had prominent cheekbones.
Well, now I'm not so sure. Apparently age can change a lot. Look at what it did to another guy. Any similarities in temperament or philosophy are purely coincidental :-)