It was an Army recon plane used in Vietnam. Basically, it was a motorized glider.
Highly classified at the time, it has been a fixture at the annual Cable Airport air fairs in Upland, Ca.
Below is one of the show's organizers.
If you send her the picture, I'm pretty sure she can put you in touch with the guys who bring the thing to the airshow. It may even be permanently based at Cable, though I don't think it's in flyable condition.
E-mail me if Mary can't help you. Her e-mail:[
Mary Barnett:
email: mary_pcc@yahoo.com