Thanks to LottoVantage for the link. http://www.1stcavmedic.com/jane_fonda.htm
Tom Hayden and Hanoi Jane explaining that American POWs weren't treated badly.
(Edited in after more careful examination: This is Jane in the gunner's seat. The crank on front of her is for training the piece. It isn't the pic I remembered, further away so you could see her in one seat, Joanie on the other, and the entire piece, but it convinces me the pic I remember was a real one.)
(Edited in: Jane again in the gunner-seat.)
I'd have sworn I remembered a picture of Jane and Joan actually sitting on that gun pointing it at the sky, but can't find the pic. Maybe it's a hallucinatory residue from all that jade I used to smoke, or maybe it's just six decades of life slipping pictures in of things I never saw.
If there was never a pic of her and Phony Joanie sitting on that gun, blog-reader, there might as well have been. Those two bitches were on the gun in spirit.
That's good enough for this atrophied brain.